Question

Carbon monoxide and chlorine gas react to produce phosgene (COCl2) gas according to the following reaction at 100.0C CO(g) + Cl2 (g) <-> COCl2 (g) Kp = 1.49x10^8

In an equilibrium mixture of the three gases, PCO = PCl2 = 2.55 x 10^-4 what is the equilibrium partial pressure (in atm) of Phosgene?
Express your answer below in decimal form (you will not be able to use scientific notation) to THREE significant figures. If your answer is negative include the sign.

Answer 1

0.000000000000000969 atm

Step-by-step explanation:

Based on the reaction:

CO(g) + Cl2(g) ⇄ COCl2(g)

Where equilibrium constant, Kp, is defined as:

Kp = 1.49x10⁻⁸ = PCOCl2 / PCO * PCl2

As PCO = PCl2 = 2.55x10⁻⁴atm:

1.49x10⁻⁸ = PCOCl2 / PCO * PCl2

1.49x10⁻⁸ = PCOCl2 / 2.55x10⁻⁴atm * 2.55x10⁻⁴atm

9,69x10⁻¹⁶atm = PCOCl2

In decimal form:

0.000000000000000969 atm