The ratio of molar specific heat of a gas at constant pressure to its molar specific heat at constant volume is:
Correct answer: C. Greater than one
- A. Equal to minus one
- B. Equal to zero
- C. Greater than one
- D. Less than one
- E. Equal to one
Explanation
The ratio of molar specific heat at constant pressure (Cp) to molar specific heat at constant volume (Cv) for an ideal gas is given by: γ = Cp/Cv In general, for an ideal gas, γ can take values greater than one. Therefore option C is the correct answer.
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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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