Can equilibrium be achieved between water and its vapour in an open vessel? Explain your answer and say what happens eventually.

We know that equilibrium cannot be achieved in an open vessel. This is because in the case of an open vessel, water vapours will keep on escaping into the atmosphere and reverse process i.e. condensation of vapours back to water cannot take place. Equilibrium can be achieved only if in the system, two opposing processes take place simultaneously. Eventually, slowly and slowly, the whole of the water will change to vapours which escape out of the vessel and the vessel will become dry.