What food item will provide a minimum of 1 mole of both sodium and potassium with the least mass? What is that mass?

the answer is na (sodium)

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.