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Two moles of helium gas are taken over t...

Two moles of helium gas are taken over the cycle `ABCDA`, as shown in the P-T diagram

Assuming the gas to be ideal the work done on the gas is taking it from A to B is:-

A

`-690R`

B

`+690R`

C

`-414R`

D

`+414R`

Text Solution

Verified by Experts

The correct Answer is:
D
`W_(DA)` = Work done in isothermal process = `2.303 muRT log(P_(1))/(P_(2))`
=`2.303 xx 2R xx 300 log(1xx10^(5))/(2xx10^(5))`
=`2.303 xx 2R xx 300 xx(-0.3010) = -414R`
Work done on the gas = `-(-414R) = 414R`
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ALLEN -GEOMETRICAL OPTICS-EXERCISE - 05 (A)
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