2.000g of compound X with molecular formula C3H4 are burned into a constant pressure calorimeter containing 45.00 kg of water at 25 degrees Celsius. The temperature of water is observed to rise by 0.5147 degrees Celsius (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 degree Celsius.