A 5 kg of copper block at a temperature of 200 oC is dropped in to an insulated tank containing 100 kg of oil at a
temperature of 30 oC. Compute the increase in entropy of the universe due to this process where copper block and oil
reach thermal equilibrium. Assume that the specific heat of copper and oil are 0.4 kJ/kg K and 2.1 kJ/kg K respectively.
