MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryThermodynamics and ThermochemistryReversible and Irreversible Work

16g of oxygen gas expands isothermally and reversibly at 300 K from 10 dm3 to 100 dm3. The work done is (in J)

A.zero

B.– 2875 J✓ Correct

C.+ 2875 J

D.infinite

Explanation

For isothermal reversible expansion, work done is given by the following formula- 2 1 V W 2.303nRT log V 16 100 W 2.303 8.314 300 log 32 10 W 2872.0713 J 2875 J >> x x x x Thus, the correct option is (b) -2875 J

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