Consider the reaction: 2Mg + O2 2MgO HRxn = -1204 kJ/mol. Suppose you react 2.43 g of Mg powder with 1.6 g of O2

Consider the reaction: 2Mg + O2 → 2MgO ΔHRxn = -1204 kJ/mol. Suppose you react 2.43 g of Mg powder with 1.6 g of O2 in a calorimeter. It contains 500 ml of water and is equilibrated to a starting temperature of 25°C. Calculate the temperature the thermometer will read after the reaction occurs. The specific heat of water is c = 4.18 J/g°C. Watch your signs.