(a) State one similarity and one difference between evaporation and boiling.
(b) List four factors which affect the rate of evaporation.
(c) Describe an activity to show that water vapour is present in air.
Explain
Answers
Explanation:
2
Factors That Affect the Rate of Evaporation
temperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.
exposed surface area of the liquid. ...
presence or absence of other substances in the liquid. ...
air movement. ...
concentration of the evaporating substance in the air.
3,Take ice cubes in a beaker and kept it open place for some time. You will notice that around the beaker there are some water droplets. This droplets formed are due to condensation of water vapor around the beaker. This confirmes the presence of water vapour in air
Answer:
( b )List four factors which affect the rate of evaporation.
temperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.
exposed surface area of the liquid. ...
presence or absence of other substances in the liquid. ...
air movement. ...
( c)Describe an activity to show that water vapour is present in air.
concentration of the evaporating substance in the air
The presence of water vapour in air can be demonstrated by the following experiment: We take a steel tumbler and put some well crushed ice in it. ... When these water vapour come in contact with the cold, outside surface of steel tumbler, they condense to form tiny droplets of water.
