When a gas is put in a container it... a. does not change shape.
b. fills up the container.
c. fills up the container and fills it up top to bottom.

c.is the answer..not sure...but i think so

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.