Which of the following would be expected to have the largest entropy per mole? — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Gases consistently have higher entropy than solids or liquids. Between the two gases $\text{SO}_2\text{Cl}_2\text{(g)}$ and $\text{SO}_2\text{(g)}$, the former has more atoms and thus a significantly greater number of vibrational and rotational degrees of freedom, yielding the highest molar entropy.