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Definitions from the Web

Definition:

The heat of evaporation refers to the amount of heat energy required to change a substance from a liquid state to a gaseous state without a change in temperature.

Senses:

1. Physics sense: The amount of heat energy needed to convert a substance from a liquid to a gas at a particular temperature.
2. Chemistry sense: The heat energy required to vaporize one mole of a substance at its boiling point.

Sample Sentences:

1. The heat of evaporation of water at its boiling point is approximately 40.7 kJ/mol.
2. When water boils, it undergoes a phase change from liquid to gas, absorbing a significant amount of heat of evaporation.
3. The heat of evaporation is responsible for the cooling effect experienced when sweating.

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