Ideal Gas Relations
For an ideal gas, the heat capacity is constant with temperature. Accordingly we can express the enthalpy as and the internal energy as . Thus, it can also be said that the heat capacity ratio is the ratio between the enthalpy to the internal energy:
Furthermore, the heat capacities can be expressed in terms of heat capacity ratio ( ) and the gas constant ( ):
It can be rather difficult to find tabulated information for, since is more commonly tabulated. The following relation, can be used to determine :
Where n is the amount of substance in moles.
Read more about this topic: Heat Capacity Ratio
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