Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of CombustionHard2 minQB
ChemistryHardsingle choice
Which of the following gases will liberate the maximum heat on complete combustion, per gram?
Options:
Answer:
C
Solution:
Heat per mole favours the big hydrocarbons, but per gram: H2: 286/2 = 143 kJ/g; C3H8: 2220/44 ≈ 50.5 kJ/g; C4H10: 2878/58 ≈ 49.6 kJ/g; C2H6: 1560/30 = 52 kJ/g. Hydrogen gives by far the most heat per gram. This is option (c).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Combustion
⏱ 2mℹ️ Source: QB
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