Question

A mixture of hydrogen and iodine gases are allowed to come to equilibrium at 445 degrees Celsius to form hydrogen iodide . Given the measured equilibrium concentrations of [H2]= 0.11 M, [I2] = 0.11 M and [HI] = 0.78 M, determine the value of the equilibrium constant .

Answer 1

Equilibrium constant K_c = $\frac{[HI]^2}{[H_2][I_2]}$

K_c = $\frac{(0.78)^2}{(0.11)(0.11)}$

K_c = $\frac{0.6084}{0.0121}$

K_c = 50.28