Consider the following reaction:

CO2(g) + C(graphite) ⇌ 2 CO(g)

A reaction mixture initially contains 0.56 atm CO2 and 0.32 atm CO. Determine the equilibrium pressure of CO if Kp for the reaction at this temperature is 2.25.
A) 0.83 atm
B) 0.31 atm
C) 0.26 atm
D) 0.58 atm
E) 0.42 atm
Answer: A

Question

Consider the following reaction:

	CO2(g) + C(graphite) ⇌ 2 CO(g)

A reaction mixture initially contains 0.56 atm CO2 and 0.32 atm CO.  Determine the equilibrium pressure of CO if Kp for the reaction at this temperature is 2.25.
A) 0.83 atm
B) 0.31 atm
C) 0.26 atm
D) 0.58 atm
E) 0.42 atm
Answer:  A

cuanchi · Answer

You need to calculate the Q with the values of initial partial pressures to determine in which direction the reaction will go. Q><=K
Then do a ICE table and write the equilibrium formula with the values to find the value of x with a quadratic equation. Finally add or subtract the value of x from the initial concentration of CO to find the P of CO at equilibrium