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Q. Which of the following is true about an ideal gas, if Cp =molar specific heat capacities at constant pressure, Cp= molar specific heat capacities at constant volume and R is the universal gas constant?
Answer: Cp – Cv = R
Notes: For an ideal gas, the molar specific heat capacities at constant pressure and volume satisfy the relation Cp – Cv = R, where R is the universal gas constant.

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