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Assuming your natural gas is 100% methane, the specific heat at constant pressure at 25°C:
Cp/R = 4.217
where R is the ideal gas constant represented in terms of energy.
Using R=8.314 Joule/(Kelvin*mole)
This yields Cp=35.06 J/(K*mol)
The heat capacity at constant volume, Cv, is related to the heat capacity at constant pressure, Cp by the following expression:
Cp-Cv=R
Therefore Cv=Cp-R = 35.06 J/(K*mol) - 8.314 J/(K*mol) = 26.75 J/(K*mol)
Assumptions:
- The system is a monotonic ideal gas
- The temperature is at or near 25°C
- Heat capacity is not a function of temperature
A more accurate heat capacity as a function of temperature is
Cp/R = 1.702 + 9.081E-3*T - 2.164*T^(-2)
where T is in Kelvins from 298K (25°C) to 1500K (1226.85°C)
Assumptions 2 and 3 above do not apply to this.
Source: Introduction to Chemical Engineering Thermodynamics. 7th Ed. by J.M. Smith, Appendix C p. 684
What else can I help you with?
Air expands according to the law pv1.3 a constant inside an enclosed cylinder find its specific heat?
c = specific heat .16902 = air at constant volume (since the cylinder size stays the same) 1.405 = specific heat of air at constant pressure divided by specific heat of air at constant volume *pressure doesn't necessarily stay constant as cylinder could be air compressor so c= 0.16902 (1.3-1.405/1.3-1) c= 0.169024 (-0.105/.3) c= 0.169024 (-0.35) c= -0.059158 or -0.059
For diatomic gas cv52rwhat is the gamma for this gas?
The specific heat at constant volume for a diatomic gas is typically 5R/2. The specific heat ratio, or gamma (γ), is defined as the ratio of the specific heat at constant pressure to the specific heat at constant volume. Therefore, for a diatomic gas with (C_v = \frac{5R}{2}), the gamma will be (\gamma = \frac{C_p}{C_v} = \frac{7R/2}{5R/2} = \frac{7}{5}) or 1.4.
What is the adiabatic index of water and other liquids?
The adiabatic index of liquid water is about 4/3 or 1.33. This value represents the ratio of specific heat at constant pressure to specific heat at constant volume. Different liquids may have slightly different adiabatic indices depending on their molecular structure and interactions.
Why the value of cp and cv is different for different gases?
The values of cp (specific heat at constant pressure) and cv (specific heat at constant volume) are different for different gases because the way gases store and release heat energy varies depending on their molecular structure and behavior. Gases with different molecular compositions have different ways of transferring and storing energy, leading to variations in their specific heat capacities.
What is the enthalpy equation used to calculate the change in heat energy of a system at constant pressure?
The enthalpy equation used to calculate the change in heat energy of a system at constant pressure is H q PV, where H is the change in enthalpy, q is the heat added or removed from the system, P is the pressure, and V is the change in volume.
Is water have specific heat at constant volume or not?
Yes it has! the specific heat of water at constant volume is given by cV : Heat capacity at constant volume cP : Heat capacity at constant pressure : Thermal expansion coefficient : Isothermal compressibility : Density
What is molar specific heat of solid at constant volume?
This is the necessary heat to raise the temprataure of 1 mol with 1 kelvin, at constant volume.
What are the properties of mass?
Density Specific Volume Pressure Temperature Viscoisy Gas Constant Heat Specific
Air expands according to the law pv1.3 a constant inside an enclosed cylinder find its specific heat?
c = specific heat .16902 = air at constant volume (since the cylinder size stays the same) 1.405 = specific heat of air at constant pressure divided by specific heat of air at constant volume *pressure doesn't necessarily stay constant as cylinder could be air compressor so c= 0.16902 (1.3-1.405/1.3-1) c= 0.169024 (-0.105/.3) c= 0.169024 (-0.35) c= -0.059158 or -0.059
Why is cp used for solids instead of cv in heat transfer?
Specific heat capacity at constant pressure (cp) is used for gases because the heat transfer is generally at constant pressure conditions. For solids, heat transfer typically occurs at constant volume since solids do not easily change their volume. Therefore, the specific heat capacity at constant volume (cv) is used for solids in heat transfer calculations.
Why we use two type of molar specific heat?
For gases, there is heat specific heat capacity under the assumption that the volume remains constant, and under the assumption that the pressure remains constant. The reason the values are different is that when heating up a gas, in the case of constant pressure it requires additional energy to expand the gas. For solids and liquids, "constant volume" isn't used, since it would require a huge pressure to maintain the constant volume.
What is the value of the of gamma in air?
The value of the specific heat ratio (gamma) in air is approximately 1.4 at room temperature. It represents the ratio of specific heats, which is the ratio of the heat capacity at constant pressure to the heat capacity at constant volume.
Why the molar specific heat at constant pressure is larger than the molar specific heat at constant volume?
The specific heat at constant pressure is larger than the molar specific heat at constant volume because if heat is added to a system it not only heats up but expands in volume. Therefore the system is doing work against the external pressure and the heat is not only stored as kinetic and potential energy but is also required to perform work. In general more heat can be stored in a system at constant pressure than one at constant volume. The specific heat at constant pressure is larger than the molar specific heat at constant volume because if heat is added to a system it not only heats up but expands in volume. Therefore the system is doing work against the external pressure and the heat is not only stored as kinetic and potential energy but is also required to perform work. In general more heat can be stored in a system at constant pressure than one at constant volume.
For diatomic gas cv52rwhat is the gamma for this gas?
The specific heat at constant volume for a diatomic gas is typically 5R/2. The specific heat ratio, or gamma (γ), is defined as the ratio of the specific heat at constant pressure to the specific heat at constant volume. Therefore, for a diatomic gas with (C_v = \frac{5R}{2}), the gamma will be (\gamma = \frac{C_p}{C_v} = \frac{7R/2}{5R/2} = \frac{7}{5}) or 1.4.
Why specific heat is large specific volume?
Specific heat has nothing to do with specific volume.
Define molar specific heats of a gas?
Molar specific heats of a gas refer to the amount of heat required to raise the temperature of one mole of the gas by one degree Celsius (or Kelvin) at constant pressure or constant volume. The specific heat capacity at constant pressure is denoted as Cp, and at constant volume as Cv. These values are important in understanding the thermodynamic behavior of gases.
What is the constant specific heat equation used for in thermodynamics?
The constant specific heat equation is used in thermodynamics to calculate the amount of heat transferred during a process when the specific heat of a substance remains constant.
