Twenty kilograms of copper at 80° C are submerged in a container that holds water at 24° C. Two hundred kilojoules of heat is transferred from the water to the 25° C surroundings. Calculate the eventual temperature of the copper, the entropy change of the water plus the copper, and the entropy change of the universe if the mass of water is
a) 6 kg,
b) 10 kg,
c) 15 kg. Use average C p values from Table B-4.