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For an ideal gas, the heat capacity at c...

For an ideal gas, the heat capacity at constant pressure is larger than that at constant volume because

A

work has to be done against intermolecular forces as the gas expands

B

work has to be done against external pressure as the gas expands

C

the molecules gain rotational kinetic energy as the gas expands

D

the molecules move faster when best is supplied at constant pressure than when supplied at constant volume

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The correct Answer is:
B
By theory.
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