One mole of a gas is expanded from (1L,10atm,300K) to (4L,5atm,300K) against a constant external pressure of 1atm. The heat capacity of gas is 50J/oC.Then the work done during the process is: (Take 1Latm≃100J)
A
−300J
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B
−600J
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C
300J
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D
−100J
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Solution
The correct option is A−300J State 1 → State 2 (1L,10atm,300K)(4L,5atm,300K)
Since, the process is irreversible isothermal expansion (as temperature remains constant) so work done is given as: