The density of material changes when temperature changes. The density of water is 1000 kg/m3 at 0 degree Celsius and is 700 kg/m3 at 300 degree Celsius.
a) Calculate the volume of
5 kg of water at 0 degree Celsius.
b) Calculate the volume of the same mass of water at 300 degree Celsius
c) What is the change in volume of 5 kg of water as it is heated from 0 to 300 degree Celsius
Answers
Answer:
The density of water is 1000 kg per meter cube. The density of water vapour at 100 degree Celsius and 1 atmospheric pressure is 0.6 kg per meter cube. The volume of a molecule multiplied by the total number gives what is called molecular volume. Estimate the ratio of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure.
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ANSWER
The density of water =1000kh/m
3
The density of water vapour =
0.6Kg/m
3
100°C
Pressure =1atp
The temperature =100°C
Estimation of the ratio of the molecular volume to the total volume occupied by the water vapour under the above condition of temperature and pressure.
T
1
P
1
V
1
=
T
2
P
2
V
2
T
1
P
1
V
1
=
T
2
P
2
V
2
(according to Charle's and Boyle's law)
where P
1
and P
2
$ be the density of water and water vapour respectively.
Since pressure and temperature are same and V
1
and V
2
be the volume of the water and water vapour respectively.
P
1
V
1
=P
2
V
2
1000×V
1
=0.6×V
2
V
2
V
1
=
10×1000
6
=6:10000
=3:5000