For a transfer of heat energy to or from a material, the quantity of heat transferred is dependent on the mass of material, the temperature change of the material, and the specific heat capacity of the material (a constant).
Since we measured out the solutions used in this part of the experiment by volume (using a graduated cylinder), we will have to convert from the volume of solution taken to the mass of the solution, using the density of the solution (1.02 g/mL) given on Page 54.
The specific heat capacity is also given on Page 54 as 3.93 Joules/goC.