JEE Main 2022 · 29 Jun · Shift 1, Chemistry question 82

17.0 g of $\mathrm{NH_3}$ completely vapourises at $-33.42$°C and 1 bar pressure and the enthalpy change in the process is 23.4 kJ mol$^{-1}$. The enthalpy change for the vapourisation of 85 g of $\mathrm{NH_3}$ under the same conditions is ______ kJ.