JEE Main 2016ChemistryThermodynamics (C)MediumMCQ

JEE Main 2016Thermodynamics (C) Question with Solution

JEE Main 2016 (03 Apr)

Question

The heats of combustion of carbon and carbon monoxide are -393.5 and-283.5 kJ mol-1, respectively. The heat of formation in kJ of carbon monoxide per mole is:

Choose an option

Show full solutionCorrect option: B
Correct answer
B-110

Step-by-step explanation

Given: Heat of combustion of carbon and carbon monoxide are -393.5 and-283.5 kJ mol-1, respectively.

(i) C+O2CO2;     H1=-393.5 kJ mol-1

(ii) CO+12O2  CO2;     H2=-283.5 kJ mol-1

To find the heat of formation of CO per mole.
C+12O2CO
Δ H f of CO

From equations (i) and (ii),
=-393.5--283.5
= - 1 1 0  kJ mol-1

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About this question

This is a previous-year question from JEE Main 2016, 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.