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The internal energy per molecule for a polyatomic gas with n degrees of freedom can be expressed as:

1. n × k × T
2. n × k × T ÷ N
3. n × k × T ÷ 2
4. 3 × k × T ÷ 2

Correct answer: n × k × T ÷ 2

Solution

The internal energy per molecule of a polyatomic gas is given by (n/2)kT, where n is the number of degrees of freedom. Thus, the correct option is nkT/2.

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