Question

The vapour pressure of water depends upon:
A. Surface area of container
B. volume of container
C. Temperature
D. all of the above

Answer 1

Hint:The vapour pressure is defined as the pressure exerted by the vapours above the liquid surface. When the water is heated to its boiling point, the molecules have enough energy to escape from the liquid.

Complete step by step answer:
The vapour pressure is also referred to as equilibrium vapour pressure which is defined as the pressure exerted by the vapour in equilibrium with its solid phase and liquid phase at a given temperature in a closed system. The equilibrium vapour pressure indicates the evaporation rate of liquid. The substance which has high vapour pressure at normal temperature is called a volatile substance.
Vapour pressure is defined as the pressure exerted by the vapours above the liquid surface. The vapour pressure of the water is defined as the pressure at which the water vapour is in thermodynamic equilibrium with its liquid state (condensed state). The water will condense at higher pressure.
The vapour pressure of water is dependent on the temperature. As the temperature of water increases vapour pressure of water also increases and as the temperature decreases the vapour pressure of the water also decreases.
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.

Note:
The type of molecule present in the liquid or solid also affects the vapour pressure. When the intermolecular forces present between the molecules are strong then the vapour pressure is low and when the intermolecular force between the molecules is weak then the vapour pressure is high.