(Solved): The decomposition of salicylic acid to phenol and carbon dioxide was carried out at 200.0C, a t ...

The decomposition of salicylic acid to phenol and carbon dioxide was carried out at $$200.0^{?}\mathrm{C}$$, a temperature at which the reactant and products are all gaseous. A $$0.300\mathrm{g}$$ sample of salicylic acid was introduced into a $$50.0\mathrm{mL}$$ reaction vessel, and equilibrium was established. The equilibrium mixture was rapidly cooled to condense salicylic acid and phenol as solids; the $${\mathrm{CO}}_2(\mathrm{g})$$ was collected over mercury and its volume was measured at $$20.0^{?}\mathrm{C}$$ and $$730\mathrm{mmHg}$$. In two identical experiments, the volumes of $${\mathrm{CO}}_2(\mathrm{g})$$ obtained were 48.2 and $$48.5\mathrm{mL}$$, respectively. Calculate $$K_p$$ for 3. A mixture consisting of $$0.150\mathrm{mol}{\mathrm{H}}_2$$ and $$0.150\mathrm{mol}{\mathrm{I}}_2$$ is brought to equilibrium at $$445^{?}\mathrm{C}$$, in a 3.25 L flask. What are the equilibrium amounts of $${\mathrm{H}}_2,{\mathrm{I}}_2$$, and $$\mathrm{HI}$$ ? $${\mathrm{H}}_2(\mathrm{g})+{\mathrm{I}}_2(\mathrm{g})?2\mathrm{HI}(\mathrm{g})K_c=50.2\text{ at }445^{?}\mathrm{C}$$