In the system at equilibrium liquid water-water vapor, if liquid water is added to the system, more liquid water molecules will change to water vapor until a new equilibrium is reached.
How can the equilibrium be affected?
If a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constraint.
Let's consider the following system at equilibrium.
H₂O(l) + heat ⇄ H₂O(g)
Which statement best describes what will happen if liquid water is added to the system?
- More liquid water molecules will change to water vapor until a new equilibrium is reached. Yes. This will happen to counteract the excess of liquid water.
- All of the liquid water molecules that are added will become water vapor. No. Some liquid molecules will change to vapor to attain a new equilibrium.
- More water vapor molecules will change to liquid water until a new equilibrium is reached. No. The change will happen in the inverse sense.
- All of the liquid water molecules that are added will remain liquid water. No. Some liquid molecules will change to vapor to attain a new equilibrium.
In the system at equilibrium liquid water-water vapor, if liquid water is added to the system, more liquid water molecules will change to water vapor until a new equilibrium is reached.
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