Use S values to calculate the standard entropy change, r S, for each of the following

Use S° values to calculate the standard entropy change, Δ_rS°, for each of the following processes, and comment on the sign of the change.
(a) NH₄Cl(s) → NH₄Cl(aq)
(b) CH₃OH(ℓ) → CH₃OH(g)
(c) CCl₄(g) → CCl₄(ℓ)
(d) NaCl(s) → NaCl(g)