In an insulated bomb calorimeter, 0.568 g of solid citric acid (C6H8O7, molar mass 192.12 g) was completely combusted, at 25.00 °C. The calorimeter contained 1032 g of water, initally at 25.00°C. The temperature of the water was observed to rise to 26.36 °C. Assume all the heat of the reaction went into heating the water, and that the heat capacity of water is 4.184 J/g-K. Calculate the molar energy change (in kJ mol-1) for combustion of citric acid. -587 O-29.2 -11.3 -484 D-1990

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