We did a lab about the heat hydration of sodium acetate with water. I got that the enthalpy of anhydrous sodium acetate is exothermic while the enthalpy of trihydrate sodium acetate is endothermic. Also that the enthalpy of the hydration of the sodium acetate salt is also exothermic. But i need to know why are they exo/endothermic by considering the changes in their intermolecular interactions.
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