When 0.850 g of Mg was burned in oxygen in a constant-volume calorimeter, 25.4 kJ of energy as heat was evolved. The calorimeter was in an insulated container with 750. g of water at an initial temperature of 18.6°C. The heat capacity of the bomb in the calorimeter is 820. J/K.

(a) Calculate ∆U for the oxidation of Mg (in kJ/mol Mg).

(b) What will be the final temperature of the water and the bomb calorimeter in this experiment?