• # question_answer 78)   The enthalpy of vaporisation of $CC{{l}_{4}}$ is $30.5kJ\,mo{{l}^{-1}}$. Calculate the heat required for the vaporisation of 284 g of$CC{{l}_{4}}$ at constant pressure. (Molar mass of$CC{{l}_{4}}=154\text{ }g\,mo{{l}^{-1}}$)

Heat required in vaporisation of 1 mol or 154 g $CC{{l}_{4}}=30.5kJ$ $\therefore$ Heat required to vaporise $284g\,CC{{l}_{4}}=\frac{30.5}{154}\times 284$ $=56.2\,kJ$