What process occurs when the temperature of a substance at Point A is increased (at constant pressure)until the substance is at Point B?
A) Condensation
B) Vaporization
C) Sublimation
D) Melting
E) Freezing

Question

What process occurs when the temperature of a substance at Point A is increased (at constant pressure)until the substance is at Point B? 
A) Condensation 
B) Vaporization 
C) Sublimation 
D) Melting 
E) Freezing

Quizplus · Accepted Answer

When the temperature of a substance is increased at constant pressure from Point A to Point B, the process that occurs is melting. This is because Point A and Point B lie on the solid-liquid phase boundary, and the substance transitions from a solid state to a liquid state as its temperature increases.

What Process Occurs When the Temperature of a Substance at Point