One mole of monoatomic gas and three moles of diatomic gas are put together in a container.Themolar specific heat (in JK⁻¹ mol ⁻¹​) at constant volume is (R = 8.3 JK⁻¹ mol⁻¹ )
a. 18.7
b. 18.9
c. 19.2
d. 19.7

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