In a certain calorimetric experiment designed to determine the specific heat capacity of copper, 0.1 kg of the metal at 100 °C is added to 2 x 10 ^-4 m ³ of water at 15 °C which are contained in a thermally insulated vessel of negligible thermal capacity. After the mixture has reached equilibrium, the temperature is found to be 18.8 °C. If the heat capacities of copper and water are essentially constant over the range of temperatures concerned, what is the specific heat capacity of copper? Does this experiment measure c _p or c _v ? Would there be much difference between these quantities for copper under the conditions of the experiment?