Vapour pressure at 100°C is:
Correct answer: C. 760mmHg
- A. 300mmHg
- B. 350 mmHg
- C. 760mmHg
- D. 760 atm
Explanation
For water, the vapour pressure reaches the standard sea level atmospheric pressure of 760 mmHg/760torr/1atm at 100°C. Mentioned on page 89 of Punjab book.
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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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