Which is a statement of the second law of thermodynamics?
a) entropy tends to increase in a system.
b) the net reaction rate is zero at equilibrium.
c) energy cannot be created or destroyed.
d) molecular motion stops at absolute zero.

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.