Exercise 1 | Chemical Equilibrium

Chapter 1 - Chemical Equilibrium

Write the equilibrium constant expressions for K_C and K_P of the following reaction and their relationship: 1) PCl₃(g) + Cl₂(g)

⇄

PCl₅(g)

2) C(s) + CO₂(g) $⇄$ 2 CO(g)

3) CaO(s) + CO₂(g) $⇄$ CaCO₃(s)

See Solutions

Solution

1) K_C= $\frac{[{PCl}_{5}]}{[{PCl}_{3}] [{Cl}_{2}]}$

K_P = $\frac{P_{{PCl}_{5}}}{P_{{PCl}_{3}} \times P_{{Cl}_{2}}}$

K_P = $\frac{K_{C}}{RT}$

2) K_C = $\frac{{[CO]}^{2}}{[{CO}_{2}]}$

K_P = $\frac{{P_{CO}}^{2}}{P_{{CO}_{2}}}$

K_P = K_C RT

3) K_C = [CO₂]

K_P = P_CO2

K_P = K_C RT