1. determine total δh for bonds broken in the reactants
(hint: there are two h2), answers: 935 kj/mol 1,371 kj/mol or 1,398 kj/mol

2. determine total δh for bonds formed in the products
(hint: there are two h2o), answers: 463 kj/mol 926 kj/mol or 1,852 kj/mol

3. determine overall change in δh, answers: positive or negative

4. record final answer with units, answers: 472 kj/mol 481 kj/mol or 917 kj/mol