A block of copper which is having the mass 500 g and initially at 293 K is in the thermal contact with an electric heater with resistance 1.0 kΩ and negligible mass. A current of 1.0 A is passed for 15 s. Determine the change in enthalpy of the copper, which is taking Cp,m = 24.4 J K-1 mol-1. This experiment is then repeated with copper immersed in a stream of water that maintains its temperature at 293 K. Determine the change in entropy of the water and the copper in this case.