3CuCl2 + 2A1 → 2AlCl3 + 3Cu
Based on the balanced equation, the molar ratio of
CuCl2 to Al should be 3:2. Compare this ratio to
the experimental number of moles computed
above. The limiting reactant(s) is/are
aluminum
copper chloride
aluminum and copper chloride

the answer to your question is c

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.