Standard enthalpy of formation of three combustiable isomeric compounds A , B , C are − 20 kcal / mol , 30 kcal / mol and 40 kcal / mol respectively then what will be order of their enthalpy of combus

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Standard enthalpy of formation of three combustiable isomeric compounds A , B , C are − 20 kcal / mol , 30 kcal / mol and 40 kcal / mol respectively then what will be order of their enthalpy of combustion

TestHub · Accepted Answer

A → B , Δ H R x n ∘ ​ = 50 k c a l / m o l . Δ H C ∘ ​ [ A ] > Δ H C ∘ ​ [ B ] . B → C , Δ H R x n ∘ ​ = 10 k c a l / m o l . Δ H C ∘ ​ [ B ] > Δ H C ∘ ​ [ C ] . So order will be Δ H C ∘ ​ [ A ] > Δ H C ∘ ​ [ B ] > Δ H C ∘ ​ [ C ] .

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