A reaction mixture contains 0.22 M CH4, 0.67 M CO2 and 1.3 M H2O. Which of the following statements is TRUE concerning this system?

Question

Consider the following reaction and its equilibrium constant:

 4 CuO(s) + CH₄(g) ⇌ CO₂(g) + 4 Cu(s) + 2 H₂O(g) K_c = 1.10

A. The reaction quotient will increase.

B. The equilibrium constant will increase.

C. The reaction will shift in the direction of reactants.

D. The reaction will shift in the direction of products.

e. The system is at equilibrium.

Answer 1

Well, answering this question is impossible because you didn't give the initial concentrations.

to determine if it's at equilibrium, you use the initial concentrations to calculate the reaction quotient, Q, and then compare it to K.

If K>Q, it shifts right to products and Q increases until Q=K.

If K<Q, it shifts left to reactants and Q decreases until Q=K.

If K=Q, there's no shift and it's at equilibrium..

Choice B is wrong because K only changes value when the temperature changes.