Consider the following equilibrium: h2o(g) + co(g) h2(g) + co2(g) a closed container is initially filled with h2o and co. which of the following correctly describes the reaction as it proceeds towards equilibrium?
a. the [co] and [co2] both increase.

b. the [co] decreases and [co2] increases.

c. the [co] increases and [co2] decreases.

d. the [co] and [co2] both decrease.