55 A 600 g lump of copper at 80.0°C is placed in 70.0 g of water at 10.0°C in an insulated container. (See Table 18-3 for specific heats.) (a) What is the equilibrium temperature of the copper–wa- ter system? What entropy changes do (b) the copper,(c) the water, and (d) the copper–water system undergo in reaching the equilib- rium temperature?