A copper rod, an aluminum rod, and a brass rod, each of 6.00 m length and 1.00 cm diameter, are placed end to end with the aluminum rod between the other two. The free end of the copper rod is maintained at water's boiling point, and the free end of the brass rod is maintained in contact with a 5.0 kg block of ice initially at a temperature of 0°C.
(a) How long does it take to melt the ice into liquid water at 0°C?
(b) What is the total entropy change of the water during this time?