When placed in a 100 ml cube-shaped box, a substance fills the cube and has a volume of 100
ml.
when placed in a 50 ml tube, that same amount of substance fills the tube and thus has a 50 ml
volume
what is the state of the substance?
solid

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.