A gas has a molar heat capacity at constant volume of 28.39 J/mol · K.Assume the equipartition theorem to be valid.How many degrees of freedom (including translational)are there for the molecules of this gas? (the ideal-gas law constant is R = 8.31 J/mol · K)

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Quizplus · Accepted Answer

The molar heat capacity at constant volume (Cv) is given by Cv = (f/2)R, where f is the degrees of freedom. Solving for f: 28.39 J/mol·K = (f/2)(8.31 J/mol·K), f = 7.

A Gas Has a Molar Heat Capacity at Constant Volume