The standard enthalpy of formation of NaOH is -425.9 kJ/mol and the standard enthalpy of formation..

The standard enthalpy of formation of NaOH is -425.9 kJ/mol and the standard enthalpy of formation of NaOH (aq, 1 m) is -469.2 kJ/mol. Determine the heat of solution of NaOH. Will the solution temperature increase or decrease when NaOH is dissolved in water. The answer is -43.3 kJ/mol; Increase Can you please show your work on paper, and provided step by step to get the answer.