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# $K_c$ from Reactions

APCHEM-EM1EID

Consider the following reactions:

$$H_2O (g) + CO (g) ⇄ H_2(g) + CO_2(g) \quad K_c = X$$

$$3FeO (s) + 3CO (g) ⇄ 3Fe (s) +3CO_2(g) \quad K_c = Y$$

$$2 H_2O (g) ⇄ O_2(g) + 2 H_2(g) \quad K_c = Z$$

Which of the following is the $K_c$ for the reaction below?

$$Fe (s) + H_2O (g) ⇄ FeO (s) + H_2(g)$$

A

$X + \cfrac{Y}{3} + \sqrt{Z}$

B

$X + \cfrac{Y}{3}$

C

$X\left(\cfrac{1}{Y}\right)^{\frac{1}{3}}$

D

$\cfrac{\sqrt{Z}}{(Y^{1/3})}$