What do dipole-dipole forces do?
A. Replace covalent bonds with hydrogen bonds
B. Turn nonpolar molecules into solids
C. Hold polar molecules together
D. Hold nonpolar molecules together

C. Hold polar molecules together.

Explanation:

This is just something you have to know.

a

explanation:

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.