Question

10 mL of water is kept in each container: glass tumbler, plate, cup, measuring cylinder. In which container the rate of evaporation will be highest and why?

Answer 1

• Evaporation is the process in which a liquid changes to vapors even below its boiling point.
• Evaporation is an endothermic reaction because water molecules must absorb heat from the surroundings to increase their kinetic energy and change them to vapors.

Factors affecting evaporation are:

1. Temperature
2. Surface Area
3. Humidity
4. Wind speed
5. Nature of the liquid

Surface Area: As the surface area increases, the rate of evaporation also increases as evaporation is a surface phenomenon. The plate has the maximum surface area, showing the highest evaporation rate.

Conclusion: The rate of evaporation will be the highest on the plate, as its surface area is maximum.