Demonstrate that kgL^1 and gcm^3 are
equivalent units of density

1 kg = 1000g

1l = 1000cm3

therefor

kg/l = 1000g/1000cm3

cancel the zeros

kg/l = g/cm3 demonstrated

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.