Mechanical Basics Thermal Engineering

Ratio of Specific heat at Constant Volume and Constant Pressure

Ratio of Specific heat: It is defined as the ratio of specific heat at Constant Pressure to Specific heat at Constant Volume. It is represented by Gamma(γ)

(γ or Gamma) = Cp/Cv.

Ratio of Specific heat at Constant Volume and Constant Pressure
A ratio of Specific heat at Constant Volume and Constant Pressure

Specific heat at Constant Volume and Constant Pressure:

The ‘γ‘ value is different for different gases and is as follows.

  • γ = 1.63 for monoatomic gases.

  • γ = 1.4 for Diatomic Gases.

  • γ = 1.33 for Triatomic gases.

 

Specific heat at constant volume:

It is defined as the ratio of change in Internal energy to Change in Temperature at Constant Volume.
(Cv) = (du/dt)@Constant Volume

Specific heat at constant Pressure:

It is defined as the ratio of Change in Enthalpy to Change in temperature at Constant Pressure.
(Cp) = (dh/dt)@Constant Pressure.

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This is the complete explanation of Specific heat at Constant Pressure and Constant Temperature.

 

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