Arkansas State University Department of Chemistry and Physics

1. Using bond energies, calculate the DH_rxn for each of the following:

a)   2 H_{2 (g)}   +   O_{2 (g)}  ------->  2 H₂O _(l)

DH_rxn = -482 kJ

b)   CH_{4 (g)}  +    2 O_{2 (g)}  ------->     CO_{2 (g)}   +   2 H₂O _(l)

DH_rxn = -802 kJ