A student combined $25.0\,\text{cm}^3$ of $4.00\,\text{mol dm}^{-3}$ hydrochloric acid with the same volume of $4.00\,\text{mol dm}^{-3}$ sodium hydroxide. At the start, each solution was at $15.0\,^{\circ}\text{C}$. The highest temperature reached was $30.0\,^{\circ}\text{C}$. Assume the heat capacity of the final solution is $4.18\,\text{J K}^{-1}\text{ g}^{-1}$ and that its density is $1.00\,\text{g cm}^{-3}$. Calculate the enthalpy change of neutralisation of hydrochloric acid.
- A$-62.7\,\text{kJ mol}^{-1}$
- B$-31.4\,\text{kJ mol}^{-1}$
- C$-15.7\,\text{kJ mol}^{-1}$
- D$-3.14\,\text{kJ mol}^{-1}$