Chapter 17, Problem 111CP

If wet silver carbonate is dried in a stream of hot air. the air must have a certain concentration level of carbon dioxide to prevent silver carbonate from decomposing by the reaction

${\text{Ag}}_{\text{2}}{\text{CO}}_{\text{3}}\left(s\right)\rightleftharpoons {\text{Ag}}_{\text{2}}\text{O}\left(s\right)+{\text{CO}}_{\text{2}}\left(g\right)$

∆H° for this reaction is 79.14 kJ/mol in the temperature range of 25 to 125°C. Given that the partial pressure of carbon dioxide in equilibrium with pure solid silver carbonate is 6.23 × 10⁻³ torr at 25°C, calculate the partial pressure of CO₂ necessary to prevent decomposition ofAg₂CO₃ at 110°C. (Hint: Manipulate the equation in Exercise 79.)