Question 311: Thermodynamics & KTG

Question

In the reported figure, there is a cyclic process ABCDA on a sample of 1 mol of a diatomic gas. The temperature of the gas during the process A $	o$ B and C $	o$ D are T
1
and T
2
(T
1
> T
2
) respectively.
Choose the correct option out of the following for work done if processes BC and DA are adiabatic.
![](https://imagex.cdn.examgoal.net/1ks0kxlzg/f990e5d7-ee40-4aee-831b-17ade461523b/c031acc0-f6d5-11eb-b326-31a7780220e7/file-1ks0kxlzh.jpg)

Accepted Answer

Work done in adiabatic process = ${{ - nR} \over {\gamma  - 1}}({T_f} - {T_i})$
$	herefore$ ${W_{AD}} = {{ - nR} \over {\gamma  - 1}}({T_2} - {T_1})$
and ${W_{BC}} = {{ - nR} \over {\gamma  - 1}}({T_2} - {T_1})$
$	herefore$ ${W_{AD}} = {W_{BC}}$

Answer

W
AB
= W
DC

Answer

W
AD
= W
BC

Answer

W
BC
+ W
DA
> 0

Answer

W
AB
< W
CD

Thermodynamics & KTG

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