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Question: Answered & Verified by Expert
The heat of combustion $\left(\mathrm{kJ} \mathrm{mol}^{-3}\right\}$ is highest for
ChemistryThermodynamics (C)TS EAMCETTS EAMCET 2019 (04 May Shift 1)
Options:
  • A $\mathrm{H}_2(g)$
  • B $\mathrm{H}_2(\mathrm{O})$
  • C LPG
  • D $\mathrm{CH}_4(g)$
Solution:
2755 Upvotes Verified Answer
The correct answer is: LPG
The heat change when one mole of the substance is completely burnt in oxygen is called enthalpy of combustion.
LPG (Liquefied Petroleum Gas) is mixture of propane or butane. With increase in number of $\mathrm{C}$-atom heat of combustion increases.
Thus, option (3) is correct.

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