11g of Compound X with molecular formula C3H6 are burned in a constant-pressure calorimeter containing of 50kg water at 25 degrees C . The temperature of the water is observed to rise by 2.448 degrees 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 25C .
Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.