Question

Use the equation to answer the question.

H2O(l) + heat ⇄ H2O(g)

A sample of water is at equilibrium at 100°C. Which statement best describes what will happen if liquid water is added to the system?

(1 point)
Responses

More liquid water molecules will change to water vapor until a new equilibrium is reached.
More liquid water molecules will change to water vapor until a new equilibrium is reached.

All of the liquid water molecules that are added will remain liquid water.
All of the liquid water molecules that are added will remain liquid water.

All of the liquid water molecules that are added will become water vapor.
All of the liquid water molecules that are added will become water vapor.

More water vapor molecules will change to liquid water until a new equilibrium is reached.

Answer 1

All of the liquid water molecules that are added will remain liquid water.

At a given temperature the vapor pressure of water is fixed. Adding more liquid does not change that equilibrium vapor pressure, so the extra liquid will not convert to more vapor at 100°C.