Chemistry
Grade-6
Easy
Question
Vapor pressure of liquid and atmospheric pressure should always be:
- V. P=A.P
- V.P>A.P
- V.P<A.P
- 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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