A pure substance Cannot be separated into other substances
by means

Explanation:

By ordinary chemical means/reaction

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun

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.