Which of the following thermodynamic sets correctly characterizes a non-ideal solution exhibiting a — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

In a positive deviation, A-B interactions are weaker than pure interactions. Breaking the old strong bonds requires more energy than forming the new weak bonds (endothermic, $\Delta H_{mix} > 0$). Weak interactions also cause the molecules to sit further apart, expanding the volume ($\Delta V_{mix} > 0$).