Question

what is the Cv for a diatomic gas?​

Answer 1

Explanation:

The Cv of an ideal diatomic gas is 5/2 except at very low and very high temperatures BECAUSE of quantum effects (e.g. the "freezing out" of vibrational modes except at very high temperatures), as shown in ehild's excellent chart.

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Answer 2

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Value of Cv for monatomic ideal gas is 5R/2.

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