The equilibrium constant,K_p ,for the reaction
CO(g) + H₂O(g)
CO₂(g) + H₂(g)
At 986°C is 0.63.A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide,0.20 atm of water vapor,0.30 atm of carbon dioxide,and 0.27 atm of hydrogen.Is the system at equilibrium?

Question

The equilibrium constant,K_p ,for the reaction
CO(g) + H₂O(g)

The equilibrium constant,K<sub>p</sub> ,for the reaction CO(g) + H<sub>2</sub>O(g) CO<sub>2</sub>(g) + H<sub>2</sub>(g) At 986°C is 0.63.A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide,0.20 atm of water vapor,0.30 atm of carbon dioxide,and 0.27 atm of hydrogen.Is the system at equilibrium? A) Yes. B) No,the forward reaction must proceed to establish equilibrium. C) No,the reverse reaction must proceed to establish equilibrium. D) The volume of the container must be known before deciding. E) The starting concentrations of all substances must be known before deciding.

CO₂(g) + H₂(g)
At 986°C is 0.63.A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide,0.20 atm of water vapor,0.30 atm of carbon dioxide,and 0.27 atm of hydrogen.Is the system at equilibrium?

Quizplus · Accepted Answer

To determine if the system is at equilibrium, calculate the reaction quotient Qc using the given concentrations:

Qc = (PCO) x (PH2S) / (PCOS x PHS2)

= (1.2 atm) x (0.27 atm) / [(0.30 atm) x (0.20 atm)]

= 5.67

Since Qc ≠ K at 986°C (K = 0.63), the system is not at equilibrium. The forward reaction must proceed to reach equilibrium. Therefore, the correct answer is B.

The Equilibrium Constant,Kp ,For the Reaction

The Equilibrium Constant,K_p ,For the Reaction