Answer to Question #129387 in General Chemistry for Igben elohor

Question

CO(g) + H2O(g) → CO2(g) + H2(g)

From the reaction above, calculate the standard heat change if the standard enthalpies of formation of CO2(g), H2O(g) and CO(g) in kJ mol-1 are -394, -242 and -110 respectively.

Answer 1

∆H_net = ∆H_products - ∆Hreactants

∆H_net = ∆H_CO2 + ∆H_H2 - ∆H_CO - ∆H_H2O

∆H_net = -394 +0 -(-242) -(-110)

∆H_net = -42 KJ/mol