 Solution

ID: past-exam-of-the-chemistry-a-course-of-the-university-of-cambridge/2025/paper-2/a7/a/ii/solution

For a linear rigid rotor in the high-temperature regime,

q_{rot} \propto T

. Its molar rotational entropy is

S_{m, rot} = R (lo g q_{rot} + 1) .

The rotational symmetry number must already be included in

q_{rot}

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