Therefore, the heat capacity of a gas of N diatomic molecules is predicted to be 7N·​1⁄2kB: the momenta p1 and p2 contribute three degrees of freedom each, and the extension q contributes the seventh.
因此一有N雙原子分子的氣體的熱容被預測為7N·½kB：p1及p2各提供三個自由度，q的延伸提供第七個。