Chapter 16, Problem 39E

Calculate △G ° for each of the following reactions from the equilibrium constant at the temperature given.

(a) ${\text{N}}_2\left(g\right)+{\text{O}}_2\left(g\right)\to 2\text{NO}\left(g\right)$ $\text{T}=2000°\text{C}$ $K_{\text{p}}=4.1\times {10}^{-4}$

(b) ${\text{H}}_2\left(g\right)+{\text{I}}_2\left(g\right)\to 2\text{HI}\left(g\right)$ $\text{T}=400°\text{C}$ $K_{\text{p}}=50.0$

(c) ${\text{CO}}_2\left(g\right)+{\text{H}}_2\left(g\right)\to \text{CO}\left(g\right)+{\text{H}}_2\text{O}\left(g\right)$ $\text{T}=980°\text{C}$ $K_{\text{p}}=1.67$

(d) ${\text{CaCO}}_3\left(s\right)\to \text{CaO}\left(s\right)+{\text{CO}}_2\left(g\right)$ $\text{T}=900°\text{C}$ $K_{\text{p}}=1.04$

(e) $\text{HF}\left(aq\right)+{\text{H}}_2\text{O}\left(l\right)\to H_3{O}^{+}\left(aq\right){\text{+F}}^{-}\left(aq\right)$ $\text{T}=25°\text{C}$ $K_{\text{p}}=7.2\times {10}^{-4}$

(f) $\text{AgBr}\left(s\right)\to {\text{Ag}}^{+}+{\text{Br}}^{-}\left(aq\right)$ $\text{T}=25°\text{C}$ $K_{\text{p}}=3.3\times {10}^{-13}$