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JEE Main 18 March 2021 Shift 2 Solved Paper
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© examsnet.com
Question : 3
Total: 90
For an adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to (where,
γ
is the ratio of specific heats)
[18 Mar 2021 Shift 2]
−
γ
d
V
V
−
γ
V
d
V
−
1
γ
d
V
V
d
V
V
Validate
Solution:
The ideal gas equation for adiabatic expansion process,
p
V
γ
=
C
ln
(
p
)
+
γ
ln
(
V
)
=
C
where,
C
is constant.
On differentiating both sides, we get
d
p
p
+
γ
(
d
V
V
)
=
0
⇒
d
p
p
=
−
γ
(
d
V
V
)
© examsnet.com
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