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JEE Main 202229 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
29 June
Shift
Morning Shift
Subject
Chemistry
Chapter
Thermodynamics (C)

JEE Main 2022 · 29 June · Morning Shift · Chemistry · Thermodynamics (C)

17 . 0g of NH _ 3 completely vapourises at - 33 . 42 ° C and 1 bar...

17.0g17 . 0g of NH3{NH}_{3} completely vapourises at −33.42°C- 33 . 42 ° C and 11 bar pressure and the enthalpy change in the process is 23.4kJmol−123 . 4kJ{mol}^{- 1}. The enthalpy change for the vapourisation of 85g85g of NH3{NH}_{3} under the same conditions is kJkJ.

Correct answer

117

Step-by-step solution

17.0g17 . 0g of NH3=1717=1mole{NH}_{3} = \dfrac{17}{17} = 1mole and the enthalpy change = 23.4kJmol−123 . 4kJ{mol}^{- 1}.

85g85g of NH3=8517=5moles{NH}_{3} = \dfrac{85}{17} = 5moles enthalpy change under the same conditions will be = 23.4×5=117kJ23 . 4 \times 5 = 117kJ.

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