Question

During section C → D of the heating curve of water, what mainly happens to the water molecules?

Options

• Molecules stop moving

• Molecules move faster, and the temperature rises

• Molecules lose energy and freeze

• Water changes to vapour instantly

Answer 1

Molecules move faster, and the temperature rises

Explanation:

In this stage, water is being heated as a liquid, so its molecules gain kinetic energy and move faster, causing the temperature to increase.