A sealed, insulated container holds 0.50kg of saturated water vapor at 110∘C. The vapor condenses and simultaneously cools to liquid water at 90∘C, releasing its energy entirely to a 1.0kg copper block that is initially at 20∘C inside the same container. Assume no energy leaves the container and that the copper block ends at the same 90∘C as the water. For each of the following, state whether the entropy change is positive, negative, or zero:
(a) the water sample
(b) the copper block
(c) the isolated container as a whole
Provide a brief justification for your choice in each case.