A \(25 \mathrm{~kg}\) copper block at \(373 \mathrm{~K}\) is dropped into an insulated tank that contains \(80 \mathrm{~L}\) of water at \(293 \mathrm{~K}\). Determine the final equilibrium temperature and the total change in entropy. Assume that the specific heat of steel is \(0.72 \mathrm{~kJ} / \mathrm{kg}-\mathrm{K}\) and that of oil is \(2.4 \mathrm{~kJ} / \mathrm{kg}-\mathrm{K}\).