The ratio of the molar heat capacities of a diatomic gas at constant pressure to that at constant volume is?
A
75
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B
32
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C
35
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D
52
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Solution
The correct option is A75 For a diatomic gas, Molar heat capacity at constant pressure, CP=72R Molar heat capacity at constant volume, CV=52R ∴CPCV=7/2R5/2R=7/5