Answer to Question #67790 in Chemistry for Irshad

Question

Calculate ∆H for:- CaO(s)+SO3(g) gives CaSO4(s) (∆H=?) From the following given data (1)H2(g)+1/2 O2(g) gives H2O(1) (∆H = -285.8 Kj) (2) SO3(g)+H2O(1) gives H2SO4(1) (∆H = -132.5 Kj) (3) H2SO4(1) + Ca(s) gives CaSO4(s) + H2(g) (∆H= -602.5 Kj) (4) Ca(s) + 1/2 O2(g) gives CaO(s) (∆H=-634.9 Kj)