Specific heat of air. The ratio of specific heats for air is easily measured.
Specific heat of air. temperature and pressure.
Specific heat of air 1 °C and 70. 289 Carbon monoxide CO 0. For gases, the heat that is exchanged between the system and the Sep 24, 2003 · AIRPROPS provides an interactive, menu-driven database for calculating the thermophysical properties of standard air and mixtures of nitrogen-argon-oxygen. The enthalpy of the humid air is, at a given pressure, the energy necessary to heat 1 kg of dry air from the reference temperature T 0 to the temperature T, to vaporize at T 0 the quantity of water in the humid air having an absolute humidity of ω, and to heat up the water vapor from T 0 to T. (1) becomes the molar heat capacity: molar heat capacity = C = Mc = , 1 T Q m (3) where M is the molecular mass of the material. This is the Jan 21, 2023 · The specific heat of a gas is a measure of the amount of energy necessary to raise the temperature of the gas by a single degree. Specific heat is a property that is specific to a given type of matter, and substances vary in their specific heat. 4 Based on the above equations, an application is available which shows atmospheric properties for a specific altitude. Specific Heat Capacity (Cp, Cpv) The amount of heat required to raise the temperature of a unit mass of a substance by one degree Kelvin. 00 kg of mass by \(1. Temperature Online calculator, figures and tables showing specific heat of liquid water at constant volume or constant pressure at temperatures from 0 to 360 °C (32-700 °F) - SI and Imperial units. 5 % humidity Literature heat capacity ratio γ of air at 30. Li 3. 60, 859–860 (Sept. The units of specific heat are usually calories or joules per gram per Celsius degree. 1889 0. And we can express the heat transfer as a constant times the change in temperature. 05 °C and 73. 657 1. Specific Heat of Air: The amount of energy required to raise the temperature of 1 pound of air by 1 degree Fahrenheit. Importance and Usage Scenarios 1. In the chapter on temperature and heat, we defined the specific heat capacity with the equation \(Q = mc\Delta T\), or \(c = (1/m)Q/\Delta T\). 4 for air, which is predominantly a diatomic gas. Thermodynamics Work, heat and energy systems. A relation that connects the specific heats , , and the gas constant is May 13, 2021 · where q is the specific heat transfer and w is the work done by the gas. 186 joules) per gram per Celsius degree. Moist Air - Specific Volume Specific volume of moist air is defined as the total volume of humid air per mass unit of dry air Specific Heat The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. Gases - Specific Heats and Individual Gas Constants Specific heat at constant volume, specific heat at constant pressure, specific heat ratio and individual gas constant - R - common gases as argon, air, ether, nitrogen and many more. Latent heat is the heat when supplied to or removed from air results in a change in moisture content - the temperature of the air is not changed. 1 % humidity (12) Literature heat capacity ratio γ of air at 30. 000016478 kg/m. 125 \, \text{kJ/kg} \] This means the enthalpy of the air is 25. 846 0. This value also depends on the nature of the chemical bonds in the substance, and its phase. 82 kJ/kg°C the heat capacity of water vapor, and H is the absolute humidity in kg water vapor per kg dry air in the mixture. Temperature at Constant Pressure Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units. 1013 MPa) boiling (condensation) temperature of the oxygen is equal— 183°C, that of the nitrogen -195. 0 ± 0. The result has three significant figures. Humidity Ratio (W) h t = total heat (Btu/hr) q = air volume flow (cfm, cubic feet per minute) dh = enthalpy difference (btu/lb dry air) Total heat can also be expressed as: h t = h s + h l = 1. Temperature at Constant Pressure Jun 19, 2020 · The specific heat of cadmium, a metal, is fairly close to the specific heats of other metals. 3122 1. K, C v = 0. Air - Prandtl Number Prandtl number for air vs. This hot flue gas air stream has a considerable heat quantity and can transfer some portion of heat to water to generate steam. The calculator is valid for pressure values between 1 - 250 bara and temperature values between 80 - 2500 K. Pressure at Constant Temperature The moisture holding capacity of air increases with temperature. See tables, figures and unit conversions for engineering and design applications. 00 1. Specific heat capacity of a gas is the amount of heat required to raise the temperature of one unit of mass of the gas by one unit of temperature. 005 = 25. Air - Specific Heat Ratio Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units. 186 J/g degreesC, versus air, which has a specific heat of 1. The specific heat c is a property of the substance; its SI unit is J/(kg⋅K) or J/(kg⋅C). 01 to 10000 bara. The change in its internal energy is approximately. from publication: Experimental Performance of a Solar Air Collector with a The specific heat of a substance at any temperature is defined as the quantity of heat required to raise the temperature of unit mass of that substance by one degree. (1) 318 J (2) 298 J The symbol c stands for the specific heat (also called “specific heat capacity”) and depends on the material and phase. Apr 1, 2020 · For example, the calculation of flue gas heat release or the heat absorption of working medium in thermal equipment in thermal power plant boiler is a common heat calculation. 2 kg/cu m. specific heat is a quantity of energy required for a unit mass to change the temperature by 1 K or 1°C. 2968 1. For example, the constant-pressure specific heat of air at 300 K is 1. 7164 1. The density of air at 15°C and sea level is 1. Find the ideal gas specific heat capacities of air at different temperatures, from 250 to 1500 K. Related Documents Air - Specific Heat Ratio Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units. STOICHIOMETRY AIR – CH4 MIXTURE: COMPOSITION, THERMODYNAMIC PROPERTIES AND TRANSPORT COEFFICIENTS Andriniaina Harry Solo, Malyk Benmouffok, Pierre Freton, Jean Jacques Gonzalez To cite this version: Andriniaina Harry Solo, Malyk Benmouffok, Pierre Freton, Jean Jacques Gonzalez. In mathematical terms, it is defined as: Specific Heat Capacity at Constant Sep 21, 2024 · Mass of Air: The mass of the air being heated or cooled, typically measured in pounds. 1992). 24 (Specific Heat of standard air) x . Apr 10, 2024 · The symbol c stands for the specific heat (also called “specific heat capacity”) and depends on the material and phase. Composition of air using nitrogen, argon, and The symbol c stands for the specific heat (also called “specific heat capacity”) and depends on the material and phase. 1. 00 ° C. Air Temperature, Pressure and Density vs. The symbol \(c\) stands for specific heat and depends on the material and phase. So the specific heat capacity of humid air is greater than dry air and humid air will take more energy to heat by a given amount. Enter the pressure (Pa) and Temperature (K), and the calculator should produce an estimate for the specific heat capacities, thermal conductivity, and density. An air flow of 1 m 3 /s is cooled from 30 to 10 o C . Dec 11, 2023 · Specific Heat Capacity at Constant Volume (C v): Constant-volume specific heat, denoted as C v, represents the amount of energy needed to increase the temperature of a single unit mass (1 kg) of a material by one degree (1°C or 1 K) within an isochoric process. 8°C. Molar Specific Heat. 2765 Feb 2, 2011 · where v denotes specific volume; u is specific internal energy; R is the gas constant for air. The specific heat of water is 1 calorie (or 4. or Specific heat = c = , 1 T Q m (2) and when divided by the number of moles. Altitude Elevation above sea level and air temperature, pressure and density. K]. The heat capacity of most systems is not constant and it depends on quantities like the pressure, volume and temperature. However they are all functions of temperature, and with the extremely high temperature range experienced in internal combustion and gas turbine engines one can obtain significant errors. 005 kJ/kg°C for dry air. May 25, 2024 · The specific heat capacity of dry air at constant pressure is approximately 1005 J/(kg · K) in SI units. Use the online calculator or the figures and tables with SI and imperial units. nasa. Experimental and literature values for the heat capacity ratio of air Average experimental heat capacity ratio γ of air at 29. The database can display 30 different properties for standard air and 15 different properties for mixtures of nitrogen, argon, and oxygen. The exact specific heat capacity of a substance depends on the condition under which it is measured. Specific heat c The ratio of the specific heats γ = C P /C V is a factor in adiabatic engine processes and in determining the speed of sound in a gas. 00 kg of mass by 1. Temperature at Constant Pressure (engineeringtoolbox. Review. When divided by the mass, (1) becomes the specific heat of the material. The specific heat for water is 4. The unit of heat capacity is J/ ∘ C or cal/ ∘ C. Let us consider one kilogram of air originally at 300 K in a piston-cylinder device. We will also solve some easy examples of how to calculate specific heat capacity. 774 mPa: Critical Temperature (T c)-140. e. 13) states that this condition is represented by either saturated air at 16C dry bulb or dry air at 21C dry bulb. 08 q dt + 0. The ratio of specific heats for air is easily measured. Feb 1, 2011 · The specific heat value was calculated as dry air and moist air at the outlet and inlet of compressor section, respectively [39]. 6478×10-5kg/m. Heat Capacity The amount of heat required to change the temperature of a substance by one degree. where is the Ratio of Specific Heats for air and is equal to 1. Air - Specific Heat vs. 96546 g 출처 : Air - Specific Heat vs. The specific heat at constant volume (for a unit mass or for one kmol) is a function of only. Quantity of available heat depends on the mass flow rate of flue gas and specific heat capacity of air. Jan 21, 2023 · Learn about the basic properties of air, such as density, pressure, temperature, viscosity, and specific heat. The symbol c stands for specific heat, and depends on the material and phase. Specific heat of common food and foodstuff like apples, bass, beef, pork and many more. If you found this useful, and have the need for more,… An air phase diagram included. This specific heat calculator is a tool that determines the heat capacity of a heated or a cooled sample. Definition of enthalpy of moist air. K,, and k = 1. 336 3. 336 2. 66 for an ideal monoatomic gas and γ = 1. Giacomo Torzo‡, Giorgio Delfitto‡, Pietro Scatturin*, Barbara Pecori§ ‡Dipartimento di Fisica and INFM where 1. The specific heat capacity of air is varying with the temperature as reported in the table below : Feb 9, 2024 · The specific heat of air at constant volume is 0. 362 List of Tables 1. The 'Air Specific Heat Calculator' can be used to quickly estimate specific heat or mass heat capacity of air in kJ/kg/K for the specified temperature and pressure conditions. 40 ± 0. For gases, the specific heat capacity measured at constant volume is different from the specific heat capacity Oct 3, 2024 · Air Temperature is measured in degrees Celsius (°C). Therefore, a cubic meter of water holds 3401 times as much heat as a cubic meter of air at the same Water has a much higher heat capacity, and specific heat, than air, meaning it takes more energy to heat water than it does to heat air. Thermodynamic properties of dry air - specific heat, ratio of specific heats, dynamic viscosity, thermal conductivity, Prandtl number, density and kinematic viscosity at temperatures ranging 175 - 1900 K. The specific heat is the amount of heat necessary to change the temperature of 1. Specific Heat Capacity (C p) 1006 J/kg·K: Coefficient of Thermal Expansion: 3. Dry air specific heat capacity What is the specific heat of air at usual temperature and pressure ? The specific heat capacity of air at 300K is Cp = 1. Related Tutorials Jun 19, 2020 · Water in lakes or oceans absorbs heat from the air on hot days and releases it back into the air on cool days. 2870 1. Since most specific heats are known, they can be used to determine the final temperature attained by a substance when it is either heated or cooled. Example: 1. /hr = Standard Air Constant. 08 The 1. Learn how air behaves as a gas or a liquid at varying conditions and see the phase diagram for air. 1433 1. 08 x delta T x CFM = BTUH Does this even come close to answering your question? Oct 3, 2023 · What is the specific heat of air in kJ kg C? The specific heat of dry air at constant pressure (Cp) is approximately 1. Feb 16, 2019 · Here is a little calculator for calculating the properties of air. 400 Ethane C 2H 6 0. Example Calculation. SI and imperial units. 00 \, kg\) of mass by \(1. The specific heat capacity is the amount of heat it takes to change the temperature of one gram of substance by 1°C. 5734 1. For information on Sutherland's law, see the post on the topic. Water - Specific Heat vs. In that case, we use a term called molar specific heat. Nov 1, 2004 · the ratio of the principal specific heats for air,” Am. Units: [c v] = J/(kg·K) Interpretation: the quantity of heat required to raise the temperature of unit mass of the gas by 1 degree, the volume remaining constant during heating; h: specific enthalpy evaluated relative to h R, i. 00^oC\). Let’s look at an example to illustrate what specific heat capacity actually tells us: Example: Air at room temperature has a specific heat capacity of 1012 J/kg×K. The specific internal energy provided in Table E-1 is computed by integration of the ideal gas specific heat capacity at constant volume: ref T v T ucTdT and the specific enthalpy, h, provided in Table E-1 is computed by integration of the ideal gas specific heat capacity at constant pressure: We find it more convenient to use air assuming a representative value of the Specific Heat Capacity of Air: C p,1000K = 1. 744 1. 00 ° C 1. Sea water is slightly more dense, but we will ignore that. 8. Water has a specific heat of 4. So, we can now compare the specific heat capacity of a substance on a per gram bases. How do you calculate the heat capacity of air? The heat capacity (C) of air can be calculated using the formula: C = m * Cp, where m is the mass of the air and Cp is the specific heat capacity at constant pressure. . The properties listed are density, viscosity specific heat capacity, thermal conductivity and Prandtl number Below this table is an image version for offline viewingNote: Pay attention to the units for viscosity. Pressure at Constant Temperature Figures and tables with isobaric (Cp) and isochoric (Cv) specific heat of air at constant temperature and pressure Aug 2, 2019 · The Specific Heat Capacity of a substance, also known as the Specific Heat, During night and Winter, the gradually cooling water can warm the air. The relationship between heat and temperature change is usually expressed in the form shown below where c is the specific heat. Temperature (T) The measure of thermal energy within the air, converted to Kelvin for calculations. 00 kJ/kg. 00ºC. Dec 11, 2024 · Explanation: Specific heat:. The web page provides a table and an image version of the properties for offline viewing. 7 °C: Critical Density (ρ c) 328 kg/m 3: Electrical Properties Metric; Relative Permittivity (ε r) 1. Metric Units . Find the specific heat of air at constant pressure or volume and different temperatures and pressures. 18 joule/cal. 005 kJ/kgK, see Table G1. 400 Argon Ar 0. Specific heat is the quantity of heat essential to raise the temperature of one gram of any substance by 1 degree If the same amount of heat flows into (or out of) equal masses of different substances, their temperatures may not change by the same amount. L Hunt, “Accurate experiment for measuring the ratio . 01 to 10000 Specific Heat Capacities of Air. May 13, 2021 · where q is the specific heat transfer and w is the work done by the gas. 2. The specific heat Mar 14, 2022 · 1 mol of air = 28. The specific heat is numerically equal to the amount of heat necessary to change the temperature of \(1. Chemkin Format 의 테이블 보간식으로 프로그램상에서 계산할 수 있다. 142 [kJ/kg. This means it takes 1005 Joules of energy to raise the temperature of 1 kilogram of air by Mar 1, 1995 · A simple introductory setup is described that takes a gas through a complete thermodynamic cycle; air is the working substance. Temperature at Constant Pressure Online calculator with figures and tables showing specific heat (Cp and Cv) of dry air vs Figures and tables with isobaric (Cp) and isochoric (Cv) specific heat of air at constant temperature and pressure ranging 0. 006 kJ/kg°C. Units: [h Specific heat capacities: (kcal/(kg o C)) The specific heat capacity of water is approximately 4 times higher than that of air. Metals tend to have low specific heat. At constant pressure and a temperature of 300 K (27°C), the specific heat of air, or Cₚ of air, is 1005 J/kg. Specific Heat of Air at Constant Pressure is typically 1. In thermal physics and thermodynamics, the heat capacity ratio, also known as the adiabatic index, the ratio of specific heats, or Laplace's coefficient, is the ratio of the heat capacity at constant pressure (C P) to heat capacity at constant volume (C V). The density of water is 1,000 kilograms/m³. Pressure at Constant Temperature Figures and tables with isobaric (Cp) and isochoric (Cv) specific heat of air at constant temperature and pressure ranging 0. Temperature at Constant Pressure Online calculator with figures and tables showing specific heat (Cp and Cv) of dry air vs. For air at a temperature of 25°C: \[ \text{Air Enthalpy} = 25 \times 1. Nov 23, 2024 · Specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree. Phys. The constant-pressure specific heat of selected substances can be found in Appendix G. Water At constant pressure and a temperature of 250 K (–23°C), the specific heat of air, or Cₚ of air, is 1003 J/kg. 1 % But when we consider a certain amount of mass we make use of the word Specific Heat or Specific Heat Capacity. com) 참고: Ideal gas 의 열역학적 수치들중 specific heat , Cp 와 엔탈피 그리고 엔트로피의 값은 . Composition of air using nitrogen, argon, oxygen, and carbon dioxide as constituents. The specific heat \(c\) is a property of the substance; its SI unit is \(J/(kg \cdot K)\) or \(J/(kg \cdot ^oC)\). 225 kilogram per cubic meter. This gives: delta e = cv * delta T where delta T is the change of temperature of the gas during the process,and c is the specific An air phase diagram included. When specific heat capacity of air increases, quantity of heat amount also increases. Air specific heat is the amount of heat required to raise the temperature of a unit mass of air by one degree Celsius (or one Kelvin). 075 lbs/cuft (specific density of standard air) x 60 (min/hr) = 1. 040 0. Since the amount depends on the process used to raise the temperature, there is a specific heat (cv) coefficient for a constant volume process, and a different valued coefficient for a constant pressure process (cp). It is an intensive property, meaning that it does not depend on the amount of gas present. 24 BTUs per pound per degree Fahrenheit. Densities, specific heats, viscosities and more. 1 Ratio of the specific heat of air γ=Cp/Cv using CBL, sonar and pressure sensor. temperature and pressure. At the end, we also list specific heat capacities of air, water, and some other substances. K. 005 kJ/kg/K. Properties of gases, fluids and solids. 718 1. The normal (at 0. 43×10-3 1/°C: Critical Constants Metric; Critical Pressure (P c) 3. 325 kPa pressure. Mar 29, 2015 · The properties of Air have been tabulated below, listed by temperature in ascending order. Find the specific heat capacity (C p and C v ) of air at different temperatures and pressures, as well as other thermophysical properties such as density, viscosity, thermal conductivity and diffusivity. 5203 0. This ratio γ = 1. 005 kJ/kg°C is the heat capacity of dry air, 1. 1813 j/g/C or 1 calorie/g/C. This property is crucial in understanding how air behaves under different conditions, particularly in the context of energy transfer, thermodynamic processes, and the performance of engines and HVAC systems. Specific heat is the amount of thermal energy you need to supply to a sample weighing 1 kg to increase its temperature by 1 K. s = 0. At constant volume and a temperature of 250 K (–23°C), the specific heat of air, or Cᵥ of air, is 716 J/kg. The ratio of the specific heats γ = C P /C V is a factor in adiabatic engine processes and in determining the speed of sound in a gas. 4. Find out how these properties vary with altitude and how they affect aerodynamics. Appendix—Tables of Properties of Air . 08 constant, is a constant for "standard air" in the airflow equation. Related Documents Air - Specific Heat vs. For a constant volume process, the work is equal to zero. Ideal gas properties of air are provided in Table E-1. 718 kJ/kg. "Standard air" has historically been defined by ASHRAE as having a density of 1. STOI-CHIOMETRY AIR – CH4 MIXTURE: COMPOSITION, THERMODYNAMIC Jun 17, 2019 · The symbol c stands for specific heat and depends on the material and phase. This application can also be used to predict Mach Number, Dynamic Pressure and other altitude dependent properties if an input speed and reference length are given. Water has very high specific heat. At low temperatures the air is liquified. gov/glenn Specific heat at constant volume, specific heat at constant pressure, specific heat ratio and individual gas constant - R - common gases as argon, air, ether, nitrogen and many more. The specific heat of a substance can also be described in terms of its molar amount. ; Specific heat is a function of operating temperature so it increases with an increase in operating temperature but incremental in value is negligible therefore we need to treat it is independent of temperature. Dec 5, 2024 · In the SI system, specific heat is measured in J/kg•K. For example, if an infinitesimal quantity of heat dH is required to raise a mass m of a substance from a temperature θ to a temperature θ + dθ, then the specific heat s of the substance is defined as Jun 15, 2024 · The total heat content of air, including sensible and latent heat. 21000 Brookpark Road Cleveland, OH 44135 (216) 433-4000. Figure \(\PageIndex{1}\): This power plant in West Virginia, like many others, is located next to a large lake so that the water from the lake can be used as a coolant. This paper mainly introduces the experimental principle and method of specific heat of gas, and measures the average specific heat of air at constant pressure. c v: specific heat at constant volume. The Specific-Heat Capacity, C, is the heat required to raise the temperature by 1K per mole or kg. The specific heat c is a property of the substance; its SI unit is J/(kg ⋅ ⋅ K) or J/(kg ⋅ ⋅ °C °C). In the SI system, the specific heat is numerically equal to the amount of heat necessary to change the temperature of 1. What is specific heat? Water in a lake always warms up in the summer more slowly than the Dec 1, 2011 · Specific Heat x Specific Density x 60 min. These measurements are fundamental for understanding thermodynamic processes and the behavior of gases in various physical systems. Mar 29, 2015 · Find the density, viscosity, specific heat capacity, thermal conductivity and Prandtl number of air at different temperatures and 101. Mixing of Humid Air The change in state wwhen mixing moist air - enthalpy, heat, temperature and specific humidity. 091 Carbon dioxide CO 2 0. , change in enthalpy that occurs when air is taken from T R to T. The nominal values used for air at 300 K are C P = 1. Summary of measured compositions of air. The SI unit of specific heat capacity is joule per kelvin per gram, J⋅g − 1 ⋅K − 1 (or kJ⋅kg − 1 ⋅K − 1), The Specific Heat Capacity (specific heat) is typically measured and reported at constant Pressure (Cp) or constant volume (Cv). Temperature at Constant Pressure The monoatomic ideal gas constant-volume specific heat C V ¯ is one of the more remarkable theoretical results - the first four periodic gases in the periodic table all have molar specific heats of 12. Air - Thermal Conductivity vs. 125 kJ/kg. 5 J mol-1 K-1 under conditions of constant volume, and deviations for the larger ideal gases are minor and only in the third significant figure Download Table | Specific heat capacities and speed of sound for air from publication: Evaluation of Speed of Sound and Specific Heat Capacities of Real Gases | In this paper, by use of the second Download scientific diagram | Air density and air specific heat capacity under different temperature; Source: [25]. The symbol c stands for specific heat and depends on the material and phase. 9. 1 Representative Tables of Thermodynamic Properties of Air. 00059: Optical Properties Metric; Refractive Index Ideal-gas specific heats of various common gases (a) At 300 K Gas constant, Rc p c v Gas Formula kJ/kg·K kJ/kg·K kJ/kg·K k Air — 0. 005 J/g degreesC. Related Documents Air - Prandtl Number Prandtl number for air vs. Aug 8, 2023 · Glenn Research Center. The specific heat values can be estimated based on accurate correlations as the functions of temperature and moisture [22,40]. . Temperature and Pressure Online calculator with figures and tables showing air thermal conductivity vs. 005 0. 00 ºC. The values are based on NBS Circular 564 and a formula by B G Kyle. But the difference is quite small. 0 ± 1. Nov 28, 2017 · It is actually the product of the density and specific heat of the air. However, the properties of an ideal gas depend directly on the number of moles in a sample, so here we define specific heat capacity in terms of the number of moles, not the mass. The 2013 ASHRAE Handbook of Fundamentals (page 18. Measure the Specific Heat Capacity Ratio of Air: Students can perform experiments to measure the specific heat capacity ratio of air at both constant volume and constant pressure. 667 Butane C 4H 10 0. 17 kcal/kg°C and J = 4. Aug 11, 2024 · In that case, the SI unit of specific heat is Joules per kilogram per degree Kelvin or J/kg∙K. The specific heat of air is generally 0. 2081 0. Find the isobaric and isochoric specific heat of air at different pressures and temperatures. 362 9. The specific heat at constant pressure (for a unit mass or for one kmol) is a function of only. 68 q dw gr (4) Example - Cooling or Heating Air, Total Heat. s Temperature (T) Density (ρ) Dynamic […] Specific Heat Capacity. J. Thus summing all the moles of the products we have: Using the tables of Sensible Enthalpy vs Temperature we evaluated the enthalpy of all four products at a temperature of 1280K. kharvmwodfsafxjlalehcxfdvrihwzvahpskszotyzpjxsiflly