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AIPMT 2008 Physics and Chemistry Paper
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© examsnet.com
Question : 52
Total: 100
If a gas expands at constant temperature, it indicates that :
kinetic energy of molecules remains the same
number of the molecules of gas increases
kinetic energy of molecules decreases
pressure of the gas increases
Validate
Solution:
The average translational
KE
of one molecule of an ideal gas is as follows :
K
t
=
KE
N
A
=
3
/
2
RT
N
A
=
3
2
KT
When
R
∕
N
A
=
Boltzmann constant i.e.,
E
1
∝
T
Thus, at constant temperature
KE
of molecules remains same.
© examsnet.com
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