Question

1. thermal energy is transferred away from a sample of water vapor. which of these best describes the change of state that occurs? a. condensation from point a to point b b. condensation from point b to point c c. vaporization from point b to point c

Explanation:

Condensation is the change from gas to liquid, and it occurs at a constant - temperature during a phase - change for a pure substance. In the graph, from point B to point C, the temperature remains at 100°C (boiling point of water), and thermal energy is being removed. This indicates a phase - change from gas (water vapor) to liquid (water), which is condensation. Vaporization is the change from liquid to gas and requires the addition of thermal energy.

Answer:

B. condensation from point B to point C