please i need the answer as soon as possible ! 3.000 g of Compound X with…

please i need the answer as soon as possible !

3.000 g of Compound X with molecular formula C H are burned in a constant pressure calorimeter containing 15.00 kg of water at 25°C. The temperature of the water is observed to rise by 2.178 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits. x 5 ?