NEET-XI-Physics
exam-2 year:2016
- #129One mole of an ideal monatomic gas undergoes a
process described by the equation ``PV^3`` = constant.
The heat capacity of the gas during this process is
(1) 2 R
(2) R
(3)``\frac32`` R
(4)``\frac52`` RdigAnsr: 2Ans : (2)
Sol. PVx = constant (Polytropic process)
Heat capacity in polytropic process is given by
V
R
C C
1 x
= +
Given that PV3 = constant &implies; x = 3 ...(1)
also gas is monoatomic so V
3
C R
2
= ...(2)
by formula
3 R 3 R
C R R R
2 1 3 2 2
= + = =
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