Which reactants form the salt caso4(s) in a neutralization reaction?
(1) h2s(g) and ca(clo4)2(s)
(2) h2so3(aq) and ca(no3)2(aq)
(3) h2so4(aq) and ca(oh)2(aq)
(4) so2(g) and cao(s)

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

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.