Factors affecting vapour pressure.

1.	Factors affecting vapour pressure.
Answer» i. Nature of liquid – Weaker the intermolecular forces of attraction in a liquid, higher is the vapour pressure. ii. Temperature – Vapour pressure increases with increase in temperature. Normal boiling point – Boiling temperature under 1 atm pressure Standard boiling point – Boiling temperature under 1 bar pressure For H₂O : Normal boiling point = 100°C (373 K) Standard boiling point = 99.6°C (372.6 K)

Answer»

i. Nature of liquid – Weaker the intermolecular forces of attraction in a liquid, higher is the vapour pressure.

ii. Temperature – Vapour pressure increases with increase in temperature.

Normal boiling point – Boiling temperature under 1 atm pressure

Standard boiling point – Boiling temperature under 1 bar pressure

For H₂O : Normal boiling point = 100°C (373 K)

Standard boiling point = 99.6°C (372.6 K)

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