what will be the volume of 20 litre of a gas when it is compressed from 1atm to 200 atm pressure at constant pressure
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explanation
ANSWER
Given: Q=−8 J, V
1
=400 cm
2
=0.4L
V
2
=200 cm
3
=0.2 L
Work=−P
ext
(V
2
−V
1
)
W=−0.5 atm(0.2−0.4)L
W=0.5×0.2 L−atm=0.1 L−atm
W=0.1×101.33 Joule
W=10.13 J
[1 L−atm=101.33 J]
From first law of thermodynamics,
△U=Q+W
△U=−8 J+10.13 J
△U=2.13 J
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