explain enthalpy of hydration in brief.

1. Enthalpy of hydration : It is defined as the heat change accompanying the formation of 1 mole of specified hydrate from 1 mole of an anhydrous substance on combination with the required number of moles of water.

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The heat energy released when new bonds are made between the ions and water molecules is known as the hydration enthalpy of the ion. The hydration enthalpy is the enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution.
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