Does vapour pressure of a liquid depends upon the surface area of liquid?

Does vapour pressure of a liquid depends upon the surface area of liquid?

Vapour pressure is defined as the pressure exerted by the vapours above the liquid surface. The vapour pressure of the water does not depend on the volume of the container and surface area of the container. Therefore, the correct option is C.

What happens to vapor pressure as surface area increases?

Increasing the surface area increases the evaporation rate, but it has little effect on the condensation rate. Hence, water in an open dish evaporates faster than water in a test tube, but the vapour pressure does not change.

Why does vapour pressure not depend on volume?

Vapor pressure depends on the composition of the liquid and the temperature. Vapor pressure neither depend on the total surface area of the liquid, nor on the volume of the liquid in the container, nor on the volume of container itself, just as long as some liquid remain when equilibrium is reached.

What is vapour pressure of a liquid?

The vapor pressure of a liquid is the point at which equilibrium pressure is reached, in a closed container, between molecules leaving the liquid and going into the gaseous phase and molecules leaving the gaseous phase and entering the liquid phase.

Does vapour pressure depends on external pressure?

Vapor pressures are dependent only on temperature and nothing else. It is important to note that when a liquid is boiling, its vapor pressure is equal to the external pressure. For example, as water boils at sea level, its vapor pressure is 1 atmosphere because the external pressure is also 1 atmosphere.

Does increasing surface area increases vapor pressure?

A bigger surface area allows more liquid to evaporate. However, pressure is the force exerted per unit area. So, a change in surface area doesn’t change the pressure of the vapour. “Vapour pressure” usually means the equilibrium vapour pressure.

Does vapour pressure depend on intermolecular forces?

A liquid’s vapor pressure is directly related to the intermolecular forces present between its molecules. The stronger these forces, the lower the rate of evaporation and the lower the vapor pressure.

What is vapour pressure?

Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature. The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid.

Is vapor pressure a surface phenomenon?

Evaporation. Ordinary evaporation is a surface phenomenon – some molecules have enough kinetic energy to escape. If the container is closed, an equilibrium is reached where an equal number of molecules return to the surface. The pressure of this equilibrium is called the saturation vapor pressure.