Question

2. Observe the following graph.
Considering the change in volume of
water as its temperature is raised
from 0 °C, discuss the difference in
the behaviour of water and other
substances. What is this behaviour
of water called?
0.30
25
1.20
15
1 kg Volume of water
10
05
.00
6
7
8
9
10
1
2
3 4 5
Temperature °C​

Answer 1

Answer:

Most of the substances expand on heating and contract on colling. Whereas, from the graph, it is clearly visible that water shows a distinct and peculiar behaviour between 0  

0

C to 4  

0

C. Water, instead of expanding, contracts between 0  

0

C to 4  

0

C. After 4  

0

C, it shows the normal behaviour of expansion as is shown by other substances. Thus, at 4  

0

C, water posses maximum density and minimum volume. This behaviour of water between 0  

0

C to 4  

0

C is known as anomalous behaviour of water.

Explanation: