Question

select the correct answer. the heating curve shows the energy gain of a substance as it changes from solid to gas. which section of the graph shows the liquid phase of the substance gaining kinetic energy? a. a b. b c. c d. d e. e reset next

Explanation:

Step1: Understand phase - change concepts

In a heating curve, flat sections represent phase - changes (melting or boiling) where temperature is constant while energy is being used to break intermolecular forces. Non - flat sections represent temperature increase within a phase.

Step2: Identify the liquid phase section

The solid melts to liquid at the first flat section (A). After melting, the liquid gains energy and its temperature increases until it reaches the boiling point. The section where the liquid is gaining energy and increasing in temperature is C.

Answer:

C