Question 422: Thermodynamics & KTG

Question

A gas can be taken from A to B via two different processes ACB and ADB.
When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If path ADB is used work done by the system is 10 J. The heat Flow into the system in path ADB is :
![](https://app-content.cdn.examgoal.net/fly/@width/image/1l8mg6rqn/631446fd-08ce-4fc9-923a-56e4c16a8219/e5a047f0-3f9f-11ed-835d-8b6c97a43374/file-1l8mg6rqo.png?format=png)

Accepted Answer

Using law of thermodynamics in path ACB,
$\Delta $Q
ACB
= $\Delta $U
ACB
+ $\Delta $W
ACB
$ \Rightarrow $   60  =  $\Delta $U
ACB
+ 30
$ \Rightarrow $   $\Delta $U
ACB
= 30 J
As value of $\Delta $U is path independent,
$ 	herefore $   $\Delta $U
ACB
= $\Delta $U
ADB
=  30 J
$ 	herefore $   In path ADB,
$\Delta $Q
ADB
= $\Delta $U
ADB
+ $\Delta $W
ADB
$ \Rightarrow $$\Delta $Q
ADB
= 30 + 10 = 40 J

Answer

40 J

Answer

80 J

Answer

100 J

Answer

20 J

Thermodynamics & KTG

A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If path ADB is used work done by the system is 10 J. The heat Flow into the system in path ADB is :

Choose the correct answer: