In a coffee cup calorimeter, 100mL of 0.10 M HClO4 is mixed with 100mL of 0.10 M KOH. The initial temperature of both solutions is 23.2°C. The resulting mixing temperature after the reaction is 26.3°C. The calorimeter constant is 27.8J/°C. Write the balanced chemical equation and calculate the amount of heat released by the experiment