Question

A mixture of water and graphite is heated to 600 K in a 1 L container. When the system comes to equilibrium it contains 0.17 mol of H2, 0.17 mol of CO, 0.74 mol of H2O, and some graphite. Some O2 is added to the system and a spark is applied so that the H2 reacts completely with the O2.

Find the amount of CO in the flask when the system returns to equilibrium.
Express your answer to two significant figures and include the appropriate units.

Answer 1

The amount of CO in the flask when the system returns to equilibrium is 0.17 mol.

Step-by-step explanation:

To find the amount of CO in the flask when the system returns to equilibrium, we need to consider the given equation:

CO(g) + H₂O(g) = CO₂(g) + H₂(g)

Given that 0.17 mol of H₂ and 0.17 mol of CO are present, we can use the stoichiometry of the equation to determine the amount of CO₂ produced:

Moles of CO₂ produced = 0.17 mol of CO

Therefore, the amount of CO in the flask when the system returns to equilibrium is 0.17 mol.