1.
If H++OH−→H2O+13.7 kcal\text{H}^+ + \text{OH}^- \rightarrow \text{H}_2\text{O} + 13.7\,\text{kcal}, then the heat of complete neutralisation of one gram mole of H2SO4\text{H}_2\text{SO}_4 with a strong base will be