JEE Main 2017ChemistryThermodynamics (C)EasyMCQ

JEE Main 2017 — Thermodynamics (C) Question with Solution

JEE Main 2017 (08 Apr Online)

Question

For a reaction, Ag→Al; ΔH=-3RT. The correct statement for the reaction is

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Show full solutionCorrect option: C
Correct answer
CΔH>ΔU

Step-by-step explanation

∆ H=∆ U+∆ngRT

∆ ng=np-nr=0-1=-1

∆ H=∆ U+-1RT∆ H=∆ U-RT

Given, ∆H=-3RT

-3RT= ∆ U+-1RT∆ U=-3RT+RT=-2RT

∆ H>∆ U

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About this question

This is a previous-year question from JEE Main 2017, covering the Thermodynamics (C) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.