Thermodynamics Question 222

Question: The volume of an ideal gas is 1 litre and its pressure is equal to 72cm of mercury column. The volume of gas is made 900 cm3 by compressing it isothermally. The stress of the gas will be

[UPSEAT 1999]

Options:

A) 8 cm (mercury)

B) 7 cm (mercury)

C) 6 cm (mercury)

D) 4 cm (mercury)

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Answer:

Correct Answer: A

Solution:

For isothermal process P1V1=P2V2

Therefore

P2=P1V1V2=72×1000900 =80 cm

Stress ΔP=P2P1=8072=8cm



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