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6.000 g of Compound X with molecular formula C3H4 are burned in a constant-pressure calorimeter containing...

6.000 g of Compound X with molecular formula C3H4 are burned in a constant-pressure calorimeter containing 35.00 kg of water at 25 degrees celcius. The temperature of the water is observed to rise by 1.985 degrees celcius. (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 degrees celcius. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits.

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