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

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8 cm (mercury)

7 cm (mercury)

6 cm (mercury)

4 cm (mercury)

answer is A.

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Detailed Solution

For isothermal process P1V1=P2V2⇒P2=P1V1V2=72×1000900=80cm Stress ΔP=P2−P1=80−72=8cm

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