If something takes the shape of its container, but the particles do not spread out to fill the container completely
what state of matter is it?

Liquid

The particles in a liquid are packed close together which means they have a definite volume although the particles can move around freely which leads to them having no definite shape but rather take the shape of the container they are placed in.

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.