Nine10 Points A 155 g piece of an unknown substance is burne

Nine(10 Points). A 155 g piece of an unknown substance is burned in a constant volume calorimeter. The initial temperature of water in the calorimeter was temperature was 59.40. The calorimeter has 1,755 mL of water in it. T calorimeter is 893 J/K. Determine the energy released in joules. 35.0°C and the final The heat capacity of the

Solution

1755 ml water = 1755 gm water as the density of water is 1 gm / ml.

heat released = m * s * temperature change + temperature change * heat capacity of calorimeter.

heat released = 1755 * 4.184 * (59.4 - 35.0) + (59.4 - 35.0) * 893

heat released = 200956.4 J

energy released is 200956.4 J