Question

how does the temperature of water change when it is placed in a freezer and then begins to freeze?

a. it increases first and then decreases.

b. it decreases first and then remains constant.

c. it increases first and then remains constant.

d. it decreases first and then increases.

Explanation:

When water is placed in a freezer, it loses heat, so its temperature decreases until it reaches the freezing point (0°C for pure water). Once it starts to freeze, during the phase change from liquid to solid (freezing), the temperature remains constant because the heat being removed is used for the phase change (latent heat of fusion) rather than changing the temperature. So the temperature decreases first and then stays constant.

Answer:

B. It decreases first and then remains constant.