[SOLVED] What is the enthalpy of combustion of magnesium? 1. The problem statement, all variables and given/known data Determine the enthalpy of combustion of Magnesium. Mg + 1/2O2 --> MgO magnesium + half oxygen -> magnesium oxide. 3. The attempt at a solution I am not sure how to calculate this since I don't know where to start. Is there a specific value for this? Or, is there a way we could get these values from a chart or somewhere? I need help. Thanks.