For gaseous rxn involving the complete combustion of isobutane
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The gas phase combustion of isobutane (C4H10C4H10) represented as
C4H10(g)+132O2(g)⟶4CO2(g)+5H2O(g)C4H10(g)+132O2(g)⟶4CO2(g)+5H2O(g)
Since, Δng=np−nrΔng=np−nr
Δng=9−(132+1)=9−152=+32Δng=9−(132+1)=9−152=+32
Since, Δng=+ve,ΔH>ΔE
C4H10(g)+132O2(g)⟶4CO2(g)+5H2O(g)C4H10(g)+132O2(g)⟶4CO2(g)+5H2O(g)
Since, Δng=np−nrΔng=np−nr
Δng=9−(132+1)=9−152=+32Δng=9−(132+1)=9−152=+32
Since, Δng=+ve,ΔH>ΔE
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Answer:delH>delE
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