Freezing: Liquid Particles Form Stronger Attractions with Minimal Distance Change

Steps:

• Identify the process: Constant temperature and pressure indicate a phase transition like melting or freezing.
• Analyze distance clue: "Average distance between particles changes very little" rules out gas-liquid changes, where distances shrink dramatically.
• Analyze energy clue: "Energy is released as stronger forces of attraction form" means exothermic process, where particles organize into a more ordered state.
• Match to options: Only liquid-to-solid fits both minimal distance shift (already close in liquid) and energy release (latent heat of fusion).

Why C is correct:

• Freezing (liquid to solid) is exothermic per thermodynamics, releasing energy as intermolecular forces strengthen into a lattice, with particles vibrating in place (negligible distance change).

Why the others are wrong:

• A: Gas to liquid (condensation) drastically reduces particle distance and releases energy, but distance change is large.
• B: Liquid to gas (vaporization) increases distance greatly and absorbs energy (endothermic).
• D: Solid to liquid (melting) changes distance little but absorbs energy to weaken attractions (endothermic).

Final answer: C