?It is interesting to compare the “fuel value” of a hydrocarbon in a hypothetical world

Chapter 5, Problem 5.96

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It is interesting to compare the “fuel value” of a hydrocarbon in a hypothetical world where oxygen is not the combustion agent. The enthalpy of formation of CF4(g) is -679.9 kJ/mol. Which of the following two reactions is the more exothermic?

\(\mathrm{CH}_{4}(g)+2 \mathrm{O}_{2}(g) \longrightarrow \mathrm{CO}_{2}(g)+2 \mathrm{H}_{2} \mathrm{O}(g)\) \(\mathrm{CH}_{4}(g)+4 \mathrm{~F}_{2}(g) \longrightarrow \mathrm{CF}_{4}(g)+4 \mathrm{HF}(g)\)

Text Transcription:

CH_4(g)+2O_2(g) longrightarrow CO_2(g)+2H_2O(g)

CH_4(g)+4F_2(g) longrightarrow CF_4(g)+4HF(g)

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