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 :

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 :

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