Spontaneous reactions a. area always exothermic b. always take place at a rapid rate c. always result in increased disorder of the system d. always release free energy

Option (C) is the correct answer.

Explanation:

Spontaneity is defined as the degree of randomness. This means that more randomly the particles of a matter or substance are moving more it will has the spontaneity.

For example, particles of a gas are more spontaneous than particles of a liquid.

Thus, we can conclude that spontaneous reactions always result in increased disorder of the system.

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