What is hydration enthalpy?

Answer:
Hydration enthalpy is the energy released when 1 mol of a substance is dissolved into a solution. It is always negative, as attraction bonds (e.g. dative, ion-dipole) are being formed.
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First answer by ID2331857588. Last edit by Katzie7. Contributor trust: 4 [recommend contributor recommended]. Question popularity: 3 [recommend question].