Chapter 10, Problem 10.23PAE

Without doing a calculation, predict whether the entropy change will be positive or negative when each of the following reactions occurs in the direction it is written.

(a) ${\text{CH}}_{\text{3}}\text{OH}(\mathcal{l})+\text{3}/{\text{2O}}_{\text{2}}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right)+{\text{2H}}_{\text{2}}\text{O}\left(\text{g}\right)$

(b) $B{r}_2(\mathcal{l})+{\text{H}}_{\text{2}}\left(\text{g}\right)\to \text{2HBr}\left(\text{g}\right)$

(c) $\text{Na}\left(\text{s}\right)+\text{l}/{\text{2F}}_{\text{2}}\left(\text{g}\right)\to \text{NaF}\left(\text{s}\right)$

(d) $\text{CO}\left(\text{g}\right)+{\text{2H}}_{\text{2}}\left(\text{g}\right)\to {\text{CH}}_{\text{3}}\text{OH}(\mathcal{l})$

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