Question

What are some examples of vapour pressure?

Answer 1

Hint : An example, a sample or specimen is a single phenomenon taken as representative of a form or a part representative of the whole. An object, situation, or other circumstance is used as an example to demonstrate a particular theory or standard.

Complete Step By Step Answer:
The pressure applied by the vapour in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system is known as vapour pressure or equilibrium vapour pressure. The equilibrium vapour pressure determines a liquid's evaporation rate.
The vapour pressure of a liquid is determined by the frequency of its intermolecular forces. A substance with poor intermolecular forces has a higher vapour pressure. A liquid with stronger intermolecular forces has a lower vapour pressure than one with weaker intermolecular forces.
For example, diethyl ether is a nonpolar liquid with poor dispersion properties. At $20$ degrees Celsius, it has a vapour pressure of $58.96kPa$ . Water is a polar liquid with a strong hydrogen bond that binds the molecules together. At $20$ degrees Celsius, water has a vapour pressure of $2.33kPa$ , which is much lower than diethyl ether.
Temperature affects vapour pressure, but it isn't a linear relationship. For example, the vapour pressure of water rises by $46.73kPa$ from $0$ to $80$ degrees Celsius, but it rises by $53.99kPa$ from $80$ to $100$ degrees Celsius in only a twenty-degree period.

Note :
Remember that the vapour pressure is the pressure exerted by the vapour present above a liquid surface. Weak intermolecular forces cause evaporation to speed up and vapour pressure to rise. The vapour pressure increases when the temperature rises.