Chapter 16, Problem 17E

Predict the sign of the entropy change for the following processes. Give a reason for your prediction..

(a) ${\text{Pb}}^{2+}\left(aq\right)+{\text{S}}^{2-}\left(aq\right)\to \text{Pbs}\left(s\right)$.

(b) $2\text{Fe}\left(s\right)+\frac{3}{2}{\text{O}}_2\left(g\right)\to {\text{Fe}}_2{\text{O}}_2\left(s\right)$

(C) $2{\text{C}}_6{\text{H}}_{14}\left(l\right)+19{\text{O}}_2\left(g\right)\to 14{\text{H}}_2\text{O}\left(g\right)+12{\text{CO}}_2\left(g\right)$