For one mole of gas, the relation for specific heat capacity at constant pressure 'Cp' and at constant volume 'Cv' is
Correct answer: B. Cp - R = Cv
- A. Cp + Cv = R
- B. Cp - R = Cv
- C. Cv - R = Cp
- D. Cp + R = Cv
Explanation
Mayer's formula describes the relationship between the molar specific heats for an ideal gas, which is Cp - Cv = R. Rearranging this equation gives Cp - R = Cv.
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About Molar Specific Heat of a Gas
Molar specific heat is the heat required to raise the temperature of one mole of a gas by one kelvin, expressed through Q = nCΔT. Questions compare the constant volume value Cv with the constant pressure value Cp, apply the ideal gas relation Cp − Cv = R, and identify how the thermodynamic process affects heat capacity.
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