Which of the following has the smallest molar entropy at 298 K? A) Cl₂(g) B) N₂(g) C) He(g) D) F₂(g) E) Ne(g)

Question

Quizplus · Accepted Answer

He(g) has the smallest molar entropy at 298 K because it is a monatomic gas, meaning it has fewer degrees of freedom and therefore fewer ways of arranging its energy compared to the diatomic gases (such as Cl2, N2, and F2) listed in the other answer choices. Additionally, He has a smaller molar mass than Ne, which contributes to a lower molar entropy.

Which of the Following Has the Smallest Molar Entropy at 298