Which phase change is an example of an exothermic process?

Liquid to Solid
Gas to Solid
Gas to Liquid
All the above
All the above  Processes that require or give off heat will be limited to changes of state, known as phase changes, and changes in chemical constitution, or chemical reactions. Changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing._x000D_ An exothermic process is one that gives off heat, which is transferred to the surroundings. An endothermic process is a reaction which heat has to be supplied to the system from the surroundings._x000D_ Here in all the given options, heat is taken away from them to change there phase._x000D_ Liquid to Solid — Freezing_x000D_ Gas to Liquid — Condensation_x000D_ Gas to Solid — Deposition_x000D_ are all examples of exothermic processes

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