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CBSE Class 11-science Answered

How is vapour pressure of a liquid related to the intermolecular forces between molecules and the temperature?
Asked by HIMANSHI SHARMA | 11 Oct, 2013, 08:32: PM
answered-by-expert Expert Answer
The pressure exerted by a vapour in equilibrium with its solid or liquid phase is called vapour pressure.
 
Vapour pressure increases with temperature.
  • At higher temperature more molecules have the necessary kinetic energy to escape the intermolecular force of attraction of the liquid phase.
  • As the temperature increases, vapour pressure increases and intermolecular force of attraction decreases.
  • The more molecules in the vapour phase, the higher the vapour pressure.
The temperature at which vapour pressure becomes equal to atmospheric pressure is called boiling point.
Answered by Hanisha Vyas | 12 Oct, 2013, 08:08: PM

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