Chapter 15, Problem 9PS

The reaction

C(s) + CO₂(g) ⇄ 2 CO(g)

occurs at high temperatures. At 700 °C, a 200.0-L tank contains 1.0 mol of CO, 0.20 mol of CO₂, and 0.40 mol of C at equilibrium.

1. (a) Calculate K_c for the reaction at 700 °C.
2. (b) Calculate K_c for the reaction, also at 700 °C, if the amounts at equilibrium in the 200.0-L tank are 1.0 mol of CO, 0.20 mol of CO₂, and 0.80 mol of C.
3. (c) Compare the results of (a) and (b). Does the quantity of carbon affect the value of K_c? Explain.