To measure the specific heat capacity by the method of mixtures
This method is suitable for substances not readily available in block form or which are not such good heat conductors as copper or aluminium. A copper calorimeter similar to that used in the previous experiment, and containing a fixed mass of
water, is calibrated electrically so that we can subsequently use it as a heat energy measuring device of known total heat capacity (Fig. 42.3).
Calibration of calorimeter The calorimeter is about two-thirds filled with cold water. For our present purpose we shall not need to know either the mass of the calorimeter or the water so long as we always use the same mass of water. This is therefore best done by adding water with a pipette so that we can easily and quickly get the same mass of water in later experiments.
The experiment is carried out exactly as described in the last section except that the results are treated differently.