Chapter 16.1, Problem 16.1P

Predicting the Sign of ΔS

Predict the sign of ΔS in the system for each of the following processes:

(a)     ${\text{CO}}_2\left(s\right)\to {\text{CO}}_2\left(g\right)\left(\text{sublimation of dry ice}\right)$

(b)     ${\text{CaSO}}_{\text{4}}\left(s\right)\to \text{CaO}\left(s\right)+{\text{SO}}_{\text{3}}\left(g\right)$

(c)     ${\text{N}}_{\text{2}}\left(g\right){\text{+ 3 H}}_{\text{2}}\left(g\right)\to {\text{2 NH}}_{\text{3}}\left(g\right)$

(d)     ${\text{I}}_{\text{2}}\left(s\right)\to {\text{I}}_2\left(aq\right)\left(\text{dissolution of iodine in water}\right)$