Verified Solution • 2025–26 Session moderate

QJEEM22Ch28b9: JEE Main 2022 Chemistry - Class 11 JEEM22Ch28b9 Solution: 17.0 g of NH 3 completely vapourises at − 33.42 ∘ C and 1 bar…

17.0 g of NH3 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 NH3 under the same conditions is _________ kJ.

Step-by-Step Verified Solution

Number of moles of NH3=5\mathrm{NH}_{3}=5

So, required ΔH=5×23.4\Delta \mathrm{H}=5 \times 23.4

=117 kJ

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