As water warms on the stove, what is happening to the molecules in the liquid?

The water molecules start moving faster.

Explanation:

As the water is heated, the water molecules absorb heat and moves faster. The longer the water is kept on the stove, the more heat and kinetic energy the molecules gain. Soon, the hydrogen bonds break down completely because of the high kinetic energy and the water molecules escape into the air as gas.

The temperature that causes this to happen is known as the boiling point.

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