Question

Below is a graph illustrating a heating curve.



What is happening during the flat sections or plateaus on the heating curve?

(1 point)
Responses

The temperature varies unpredictably.
The temperature varies unpredictably.

The temperature is increasing.
The temperature is increasing.

The temperature is on the decline.
The temperature is on the decline.

The temperature remains unchanged.
The temperature remains unchanged.
Skip to navigation

Answer 1

During the flat sections or plateaus on the heating curve, **the temperature remains unchanged**. This occurs because the energy added is being used for phase changes (such as melting or boiling) rather than increasing the temperature.