Correct the Given Statement: High heat leads to increase in temperature and pressure.
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12th
Chemistry
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Vapour Pressure of Liquid Solutions
The following are some stat...
CHEMISTRY
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Asked on December 30, 2019 by
Rahul Methai
The following are some statements about vapour pressure.
I. Vapour pressure of a solution increases with increase in temperature.
II. Liquids with high vapour pressure even at ordinary temperatures are volatile liquids.
III. The temperature at which vapour pressure of solution is equal to atmospheric pressure is called boiling point.
IV. When a non-volatile solute is dissolved in a volatile solvent, its vapour pressure decreases.
Which of the above is/are correct?
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ANSWER
Vapour pressure of any substance increases non-linearly with temperature according to Clausius-Clapeyron relation.
The atmospheric pressure boiling point of a liquid is the temperature at which vapour pressure equals to ambient atmospheric pressure.
A substance with a high vapour pressure at normal temperature is often referred to volatile and also the vapour pressure of a solvent is lowered by the addition of non-volatile solute to form a solution.