Colton has an ice cube that has a mass of 4 grams. he places it in a sealed container and then puts it in the microwave on high. the ice cube melts after a few seconds. he removes the sealed container with the melted ice cube and checks the mass again.

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.