When a liquid is heated in a closed container, equilibrium is established between _.
Correct answer: B. Liquid and vapour
- A. Liquid and solid
- B. Liquid and vapour
- C. Liquid, solid and vapour
- D. Liquid, vapour and solid
Explanation
Vapur pressure is the pressure exerted by the vapors in the container when both vapors and the liquid molecules are in an equilibrium state. When a liquid is taken in a closed container and heated, so to establish equilibrium, the rate of vapourization and the rate of condensation become equal, reaching the state of equilibrium. Since no solid particles are present in such a case, all other options except 'B' will be considered wrong.
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About Evaporation, Boiling Point and Vapour Pressure
Evaporation is the escape of higher-energy molecules from a liquid surface, while vapour pressure is the pressure exerted by vapour in equilibrium with that liquid. The topic distinguishes evaporation from boiling and relates both to temperature, intermolecular forces, surface area, atmospheric pressure and the boiling point.
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