List two possible steps where copper yield may be lost (why you may not get all the copper back at the end). Be specific about the steps and how they might lose the copper.

b.final

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.