Consider the equilibrium reaction CO(g)+H2O(g)CO2(g)+H2(g) Determine how each ch

Question

Consider the equilibrium reaction

CO(g)+H2O(g)CO2(g)+H2(g)

Determine how each change in the left-hand column will stress the system and in which direction the equilibrium reaction will shift in response.

Drag the appropriate labels to their respective targets

Remove H2O(g)

Choices for system stress:

Forward reaction rate temporarily decreases, Reverse reaction rate temporarily decrease, Reverse reaction rate temporarily increases, Forward reaction rate temporarily increases

Choices for equilibrium shift:

increase reactant , increase product, decrease product, decrease reactant

Change System Stress Equilibrium shif Add CO(g)

Remove H2O(g)

Add CO2(g) Remove H2(g)

Explanation / Answer

The reaction:

CO(g)+H2O(g)CO2(g)+H2(g)

Before we go on, it would make easier to first show what the forward and reverse reactions are. Based on the reaction above, the forward reaction (reagents products) is:

CO(g)+H2O(g) CO2(g)+H2(g)

And the reverse reaction (products reagents) is:

CO2(g)+H2(g) CO(g)+H2O(g)

It would also be important to note that the reaction rate is zero once the reaction reaches equilibrium (this doesn't mean the reaction stops, it means the forward and reverse reaction rates are the same). So we would expect the forward or reverse reaction rates to temporarily increase if the system at equilibrium is stressed.

Now, for the problem:

The table:

Forward reaction rate temporarily increases

Reverse reaction rate temporarily decreases

Remove H2O(g)

Reverse reaction rate temporarily increases

Forward reaction rate temporarily decreases

Reverse reaction rate temporarily increases

Forward reaction rate temporarily decreases

Forward reaction rate temporarily increases

Reverse reaction rate temporarily decreases

Change System Stress Equilibrium shift Add CO(g)

Forward reaction rate temporarily increases

Reverse reaction rate temporarily decreases

Increase product

Remove H2O(g)

Reverse reaction rate temporarily increases

Forward reaction rate temporarily decreases

Increase reactant Add CO2(g)

Reverse reaction rate temporarily increases

Forward reaction rate temporarily decreases

Increase reactant Remove H2(g)

Forward reaction rate temporarily increases

Reverse reaction rate temporarily decreases

Increase product

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