Chemistry

Question Analysis
This question involves two criteria: identifying the phase change that is endothermic and the one that involves a liquid-to-gas transition. The main focus is on linking phase change direction to energy requirements.

Key Concept Explanation
Endothermic phase changes absorb thermal energy to break intermolecular forces.
Vaporization (which includes boiling and evaporation) is the endothermic process where a liquid transitions to a gas.
Condensation (gas → liquid), freezing (liquid → solid), and deposition (gas → solid) are all exothermic processes that release thermal energy.

Step-by-Step Solution
1. Filter options by the directional transition: Liquid → Gas. Only option B (Vaporization) matches this transition.
2. Confirm the energy change:...