When 2.50 g of a certain hydrocarbon was completely combusted in a "bomb (constant-volume) calorimeter" with a heat capacity (excluding water) of 350 j/°c and which contained 2.00 liters of water (density = 1.00 g/ml and specific heat capacity = 4.184 j/°c•g), the resulting temperature change was measured to be 5.52°c. calculate the thermal energy (in kj) released per gram of hydrocarbon combusted. (1) 48.1 kj/g (2) 0.773 kj/g (3) 19.2 kj/g (4) 18.5 kj/g (5) 46.2 kj/g