2.2.3 Melting, boiling and evaporation (3)

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1.

Describe evaporation in terms of the escape of more-energetic particles from the surface of a liquid. In your answer, explain how temperature relates to the rate of evaporation.

2.

Water is a crucial substance in many chemical and biological processes. State the melting point and boiling point of water at standard atmospheric pressure (1 atm). Explain, in terms of intermolecular forces, why water has relatively high melting and boiling points compared to other molecules of similar size.

3.

Describe, in terms of energy input, the processes of melting and boiling. Explain how these processes occur without a change in temperature.