A student broke this geode in half which tool would best help the student study the crystals inside

c is the answer because when something is left after something evaporates that shows the chemical change.

points

explanation:

answerleaving cheese out to get moldy;

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.