Using Hess's law of constant heat of summation and given:  I) H2O(l) → H2O(g)                                            ?H = -44

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Using Hess's law of constant heat of summation and given:

 I) H2O(l) → H2O(g)                                            ?H = -44.1 kJ

 II) CH3COCH3(l) + 4O2(g) → 3CO2(g) + 3H2O(l)                       ?H = -1787 kJ

 III)  CH3COOH(l) + 2O2(g) → 2CO2(g) + 2H2O(l)                       ? H = -835 kJ

determine the enthalpy of reaction for

CH3COCH3 (l) + 2 O2(g) → CH3COOH(l) +CO2(g) + H2O(g)