Question

A sample of 1.150 g of sucrose (342.3 g mol-1) undergoes combustion in a bomb calorimeter. If the temperature rises by 4.22 °C and the heat capacity of the calorimeter assembly (including the water) is 4.90 kJ °C-1, what is the heat of combustion of sucrose, in kJ mol-1?

Answer 1

q = Ccal x dT = 4.90 kJ/C x 4.22 = ? kJ
? kJ x (342.3/1.150) = ?kJ/mol sucrose