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Question

# CV and CP denote the molar specific heat capacities of a gas at constant volume and constant pressure,respectively. Then

A

- is larger for a diatomic ideal gas than for a monatomic ideal gas.

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B

+ is larger for a diatomic ideal gas than for a monatomic ideal gas

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C

is larger for a diatomic ideal gas than for a monatomic ideal gas

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D

. is larger for a diatomic ideal gas than for a monatomic ideal gas.

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Solution

## The correct options are B + is larger for a diatomic ideal gas than for a monatomic ideal gas D . is larger for a diatomic ideal gas than for a monatomic ideal gas. For a diatomic gas , CP + CV = 7R2 + 5R2 = 6R For a mono atomic gas, 5R2 + 3R2 = 4R CP×CV for diatomic gas = 35R24 And for mono atomic gas = 15R24 CPCV = 1 + 2f is smaller for diatomic gas than for mono atomic gas. CP - CV = R

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