Ejercicio 2022-E - Question 5. Equilibrium of SO3 decomposi… · Química II URV 2012

2022-E - Question 5. Equilibrium of SO3 decomposition (1.5 points)

En una síntesi industrial, el compost P s'obté mitjançant una cinètica de primer ordre respecte al reactiu A. L'energia d'activació és $E_a = 62{,}3\text{ kJ/mol}$ i a $80\text{ }^\circ\text{C}$ la constant de velocitat val $k = 0{,}00694\text{ s}^{-1}$.

For the gas-phase reaction:$$\text{SO}_3(\text{g}) \rightleftharpoons \text{SO}_2(\text{g}) + \frac{1}{2}\text{O}_2(\text{g})$$the equilibrium constant is $K_p = 0{,}157$ at 900 K, and $\Delta H^\circ = +88{,}6\text{ kJ/mol}$.

a)

A vessel contains 1.00 mol $\text{SO}_3$, 1.00 mol $\text{SO}_2$ and 1.00 mol $\text{O}_2$ at 900 K under a total pressure of 2.00 atm. Determine $\Delta G$ for the system.

b)

Explain what effect increasing total pressure has on the equilibrium constant and on the mixture composition.

c)

Explain what effect increasing temperature has on the equilibrium constant and on the mixture composition.