Which of the following is a process with a negative δs?

a)caco3(s) → cao(s) + co2(g)

b)co2(s) → co2(g)

c)none of the choices are correct because δs cannot be negative.

d)dissolving sugar in water

e)h2o(l) → h2(s)

The only reaction there that has a negative delta S is H2O(l) going to H2(s). That is because liquids have more entropy than solids therefore the change is negative since you are going from a higher state of entropy to a lower state of entropy. However, I don't know if that reaction is possible. For one, the oxygen disappears and two, liquid hydrogen is really hard to make. I don't think a reaction can produce it.

10.063g / 10.00 ml = 1.0063 g/ml which rounds off to 4 sig figs as: 1.006 g/ml