The molar specific heat at constant pressure (Cp) for a diatomic gas is:
Correct answer: C. 7R/2
- A. 5R/2
- B. 3R/2
- C. 7R/2
- D. R
Explanation
For a diatomic gas, Cv = 5R/2. Using the relation Cp = Cv + R, we get Cp = (5R/2) + R = 7R/2, where R is the gas constant.
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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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