Aweak acid placed in water contains

a. the same number of unionized acid molecules as a strong acid in water.
b. no unionized acid molecules.
c. a lower concentration of unionized acid molecules than a strong acid in water.
d. a higher concentration of unionized acid molecules than a stronger acid in water

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.