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JEE Main 202125 JulyMorning Shift
Exam
JEE Main
Year
2021
Date
25 July
Shift
Morning Shift
Subject
Chemistry
Chapter
Thermodynamics (C)

JEE Main 2021 · 25 July · Morning Shift · Chemistry · Thermodynamics (C)

At 298K , the enthalpy of fusion of a solid (X) is 2 . 8kJ mol ^ -...

At 298K298K, the enthalpy of fusion of a solid \left(X\right)isis2 . 8kJ{mol}^{- 1} and the enthalpy of vaporisation of the liquid \left(X\right)isis98 . 2kJ{mol}^{- 1}.Theenthalpyofsublimationofthesubstance(X)inkJmol−1. The enthalpy of sublimation of the substance \left(X\right) in kJ{mol}^{- 1} is ______. (in nearest integer)

Correct answer

0

Step-by-step solution

ΔHsub=ΔHfus.+ΔHvap.{\Delta H}_{sub} = {\Delta H}_{fus .} + {\Delta H}_{vap .}

=2.8+98.2= 2 . 8 + 98 . 2

=101kJ/mol= 101kJ / mol

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