15g of Mg were used in the trial. I’ve calculated .006mol of Mg were used in trial 1. The temperature change was an increase of 13C.

0.15g of Mg were used in the trial.  I’ve calculated .006mol of Mg were used in trial 1.  The temperature change was an increase of 13C.  

I need help (at least the formula) for calculating the heat of reaction of this reaction

as well as calculating the enthalpy of the reaction.