Mercury can be obtained by reacting mercury(II) sulfide with calcium oxide. How many grams of mercury(II) sulfide are needed to produce 26.0 of CaS O4?

28528289 29823282 8298232 39858

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.