Question

The graph below illustrates a change in energy during a phase change.

Which explanation correctly describes the phase change in the graph? .
This is an exothermic reaction that involves melting.
This is an exothermic reaction that involves freezing.
This is an endothermic reaction that involves vaporization.
This is an endothermic reaction that involves condensation.

HELP ME PLEASE!!!!!!!

Answer 1

The phase change depicted in the graph is an endothermic reaction involving vaporization, where the system absorbs energy to transition from liquid to gas.

Step-by-step explanation:

The description of the phase change provided in the graph corresponds to an endothermic reaction that involves vaporization. Endothermic reactions are those wherein the system absorbs energy from the surroundings. During the phase change from liquid to gas (vaporization), energy is required to overcome the intermolecular forces between the liquid particles, thereby absorbing heat and resulting in a temperature plateau until the phase change is complete. Conversely, exothermic reactions, such as freezing (liquid to solid) and condensation (gas to liquid), release energy into the surroundings. In summary, the correct description for the phase change in the graph is 'This is an endothermic reaction that involves vaporization.'

Answer 2

B. This is an exothermic reaction that involves freezing.