2HCL+Na2SO4=2NaCL+H2SO4 If I perform this reaction with 25.0 grams of Na2SO4, what is my theoretical yield of NaCl in grams?
If I produce only 17.5 grams of NaCl when I do this reaction, what is my percent yield?

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.