write the difference between the properties of air and properties of water
Answers
Answer:
(a)
Water :
The components of water are hydrogen and oxygen which are chemically combined in a fixed ratio of 1 : 8 by mass.
The chemical composition of water remains same from whatever source it is obtained.
The properties of water are completely different
from the properties of elements from which it is formed i.e. hydrogen and oxygen.
Energy change occurs in the formation of water.
A molecule of water is represented by a definite formula H2O.
Air :
The main components of air are nitrogen, oxygen, carbon -dioxide, water vapour which are not chemically combined.
The composition of air varies from place to place. During rainy season the air becomes humid due to presence of more water vapour. Some impurities like sulphur dioxide, hydrogen sulphide etc. also changes its composition at some places.
The components of air retain their individual properties but not air.
No energy change occurs when components of air are mixed together.
Air cannot be represented by any chemical formula.