Which metal will spontaneously react with Zn2+ (aq),
but will not spontaneously react with Mg2+
(aq)
according to the activity series

no podemos ver la

explanation:

no te podemos ayudar: /

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.