Vapour pressure depends on:
Correct answer: D. All
- A. Temperature
- B. Nature of liquid
- C. Intermolecular forces
- D. All
Explanation
Factors Of Vapor Pressure: Vapour pressure depends on : * Temperature * Nature of liquid * Intermolecular forces Temperature: * Higher temperature means more kinetic energy * More kinetic energy means more molecules have enough energy to escape liquid state * More molecules in vapour state means higher vapour pressure Nature of liquid: * Polar liquids have stronger intermolecular forces * Stronger intermolecular forces make it harder for molecules to escape liquid state * Lower vapour pressure Intermolecular forces: Stronger intermolecular forces make it harder for molecules to escape liquid state and thus lower vapour pressure * Dipole-dipole forces * Hydrogen bonding * London dispersion forces
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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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