Enthalpy is an extensive property. In general, if enthalpy of an overall reaction A to B along one route is Delta_(r) H and Delta_(r) H_(1) , Delta_(r) H_(2), Delta_(r)H_(3)….. represent enthalpies of intermediate reactions leading to product B. What will be the relation between Delta_(r)H for overall reaction and Delta_(r) H_(1), Delta_(r) H_(2) ....... etc. for intermediate reactions.

Enthalpy is an extensive property. In general, if enthalpy of an overa

1.	Enthalpy is an extensive property. In general, if enthalpy of an overall reaction A to B along one route is Delta_(r) H and Delta_(r) H_(1) , Delta_(r) H_(2), Delta_(r)H_(3)….. represent enthalpies of intermediate reactions leading to product B. What will be the relation between Delta_(r)H for overall reaction and Delta_(r) H_(1), Delta_(r) H_(2) ....... etc. for intermediate reactions.
Answer» Solution :If enthalpy of an overall reaction `A to B` along ONE route is `Delta_(r) H and Delta_(r) H_(1), Delta_(r) H_(2), Delta_(r) H_(3) ….` REPRESENTING ENTHALPIES of reaction leading to same product B along another route, then we have `Delta_(r) H = Delta_(r) H_(1) + Delta_(r) H_(2) + Delta_(r) H_(3) + ......`