Which of the following sets of words are not related?
1) black body curve, intensity
2) temperature, peak wavelength
3) frequency, energy
4) doppler effect, transverse motion

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

i believe the answer is three water molecules

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.