Question

Enthalpies of formation of CO_(g), CO2_(g), N2O_(g) and N2O4_(g) are –110 kJ mol^–1 , – 393 kJ mol^{– 1} , 81 kJ mol^–1 and 9.7 kJ mol–1 respectively. Find the value of ∆rH for the reaction: 

N₂O₄(g) + 3CO_(g) N₂O_(g) + 3CO_2(g)

Answer 1

∆rH for a reaction is defined as the difference between ∆fH value of products and ∆fH value of reactants.