Question

Which statement about vapor pressure of a pure liquid is not correct?

Substances with weak intermolecular forces have high vapor pressures at a given temperature.

The vapor pressure increases with increasing temperature.

The vapor pressure is the pressure of the gas at a given temperature in equilibrium with its liquid phase.

The vapor pressure increases with increasing surface area of the liquid.

The temperature at which the vapor pressure equals 760 torr is called the normal boiling point of the substance.

Answer 1

weak intermolecular force in liquid means more molecules can overcome intermolecular force of attraction and form gases. Hence Substances with weak intermolecular forces have high vapour pressures at a given temperature

As temperature increases, liquid moves more faster and their kinetic energy increases. So, more molecules can overcome intermolecular force of attraction and form gases. Hence The vapor pressure increases with increasing temperature.

The vapor pressure is defined as is the pressure of the gas at a given temperature in equilibrium with its liquid phase.

The temperature at which the vapor pressure equals 760 torr is called the normal boiling point of the substance. This is also crrectr

Vapour pressure has nothing to do wth surface area. Vapour pressure doesn’t change with change in surface area of liquid

Answer:

The vapor pressure increases with increasing surface area of the liquid