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Synthesis reactions such as dehydration synthesis.

For a reaction to proceed the there must be a net decrease in the Gibbs Free Energy of the system.

The Gibbs Free Energy is made up of two terms:

Enthalpy or Heat Content H

Entropy S

For a reaction in which the entropy is increasing to proceed there would have to be a sufficient release of heat content (enthalpy) such that

Change in Free Energy G would be negative, ie decrease...

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