Question

what Is vapour pressure​

Answer 1

Answer:

Explanation:

Vapour pressure is the pressure exerted by the vapours of a liquid on the walls of the container in which it is enclosed.

Answer 2

Answer:

VAPOUR PRESSURE

The pressure exerted by vapour on the surface of liquid when they are in equilibrium is known as vapour pressure.

Factors affecting vapour pressure :

(1.) Temperature

$vapour \: pressure \: (v.p) \: \alpha \: temperture$

Vapour pressure is directly proportional to the temperature.

Clausius clapeyron equation

ln P2/P1 = ∆Hvap/R (1/T1 - 1/T2)

Here,

P1 and P2 are the vapour pressure at T1 and T2 respectively.

T is the temperature in Kelvin.

ln is the natural log.

R is the gas constant (8.314 J/K mol)

∆Hvap is the molar heat of vaporization.

(2.)Nature of liquid

• If the intermolecular forces of liquid decreases.Then, vapour pressure increases.

• Those liquid which have lower boiling point have higher vapour pressure.