Question

1. (a) Differentiate between boiling and vapourisation.
(6) Discuss four factors which affect evaporation.​

Answer 1

Answer:

During boiling, at the boiling point, the vaporization is fast and the vapor pressure is equal to the atmospheric pressure. ... Another difference is, evaporation takes place only at the surface of the liquid while the boiling is a bulk process where vaporization takes place throughout the liquid

Temperature: The rate of evaporation increases with an increase in temperature.

Surface area: The rate of evaporation increases with an increase in surface area.

Humidity: The amount of water vapour present in the air is called humidity.

Answer 2

ans (a)

1). boiling is bulk phenomenon but evaporation is a surface phenomenon

2).boiling point take place at a particular temperature where vapour pressure become equall to atomospheric pressure but evaporation takes place only from the surface of liquid

3). boiling point involved in formation of bubble of the vapour below the surface of liquid

4). boiling starts from bottom of container but evaporation start from the surface of container

5). boiling is a fast process but evaporation is a slow process

ans (b)

1). Temprature

2). Surface area

3). Humidity

4). Wind speed