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QJEEM16Chb0fa: JEE Main 2016 Chemistry - Class 11 JEEM16Chb0fa Solution: The heats of combustion of carbon and carbon monoxide are…

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 :

Multiple Choice Options

  • A 676.5
  • B -676.5
  • C -110
  • D 110.5

Step-by-Step Verified Solution

Given

C(s)+O2(g)→CO2(g);

ΔH=−393.5kJmol−1......(i)

CO(g)+12O2(g)→CO2(g);

ΔH=−283.5kJmol−1....(ii)

∴ Heat of formation of

Co=eqn(i)−eqn(ii)

=−393.5−(−283.5)

=−110kJ

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