Chemistry
Grade-6
Easy

Question

Vapor pressure of liquid and atmospheric pressure should always be:

  1. V. P=A.P
  2. V.P>A.P
  3. V.P<A.P
  4. Remains constant

Hint:

V.P.=A.P. liquid boils.

The correct answer is: V. P=A.P


    • At the normal boiling point of a liquid, the vapor pressure is equal to standard atmospheric pressure.
    • When the vapor pressure is equal to atmospheric pressure the liquid molecules escape the surface, and the liquid boils.
    • If the vapor pressure is greater than the atmospheric pressure the liquid will boil at a higher temperature.
    • If the vapor pressure is less than the atmospheric pressure the liquid will boil at a lower temperature.

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