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Q.

A gas undergoes isothermal irreversible expansion at 300K from 1 lit to 10  lit against an external pressure of one atmosphere. Work done by the gas is

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a

1010  KJ

b

909 J

c

5803.6  J

d

1381.8  K cals

answer is B.

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Detailed Solution

Wirr=−Pext(Vf−Vi)=−1 atm (10 l−1 l)=− 9 lit−atm=−9(101J)=−909  J

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A gas undergoes isothermal irreversible expansion at 300K from 1 lit to 10  lit against an external pressure of one atmosphere. Work done by the gas is