Enthalpy is an extensive property. In general, if enthalpy of an overall reaction A→B along one route is ∆r H and ∆r H1, ∆rH2, ∆rH3 ..... represent enthalpies of intermediate reactions leading to product B. What will be the relation between ∆r H for overall reaction and ∆rH1 , ∆rH2 ..... etc. for intermediate reactions.
Enthalpy is an extensive property. In general, if enthalpy of an overall reaction A→B along one route is ∆r H and ∆r H1, ∆rH2, ∆rH3 ..... represent enthalpies of intermediate reactions leading to product B. What will be the relation between ∆r H for overall reaction and ∆rH1 , ∆rH2 ..... etc. for intermediate reactions.
This is a Short Answer Type Questions as classified in NCERT Exemplar
According to Hess's law, ΔrH = ΔrH1+ ΔrH2+ΔrH3
This is so because during the reaction A→ B, B's formation undergoes various intermediate reactions, with the overall value of the enthalpy being ΔrH.
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Chemistry NCERT Exemplar Solutions Class 11th Chapter Six 2025
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