The following reaction does not proceed to a product: h2o + ag - no reaction. why is that?

Explanation:

It is known that a more reactive metal or substance is able to replace a less reactive metal or substance.

According to the reactivity series chart, hydrogen is much reactive than silver atom. Hence, when water is added to silver then due to less reactivity of silver atom it is unable to displace hydrogen from .

Therefore,

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.