![]() ![]() H 2SO 4 + 2NaOH (aq) → Na 2SO 4 (aq) + 2H 2O It is the change in enthalpy when one mole of water is formed when a strong acid neutralizes a base. ∆H hyd = -406 kJ/mol Enthalpy Change of Neutralization It is always negative and is denoted by ∆H hyd. It is the change in enthalpy when one mole of gaseous ions is dissolved in water to form an infinitely dilute solution. ∆H sol = -80 KJ/mol Enthalpy Change of Hydration It is the amount of heat absorbed or liberated when a substance is dissolved in a solvent to form an infinitely dilute solution.Įnthalpy change of solution may be positive or negative and is denoted by ∆H sol. The value of enthalpy change is positive because this reaction is endothermic. It is the enthalpy change when one mole of gaseous atom(s) is formed from the element.
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