Levi observed properties of four different waves and
recorded observations about each one in his chart
wave
observations
travels fastest
through metal
travels fastest
through air
travels more slowly
through water than
travels more slowly
at cool temperatures
nark this

c (diamond),

sio2 (quartz)

c. orbital shape i hope this is correct

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.