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 the path ADB is used then work done by the system is 10 J , the heat flows into the system in the path ADB is:

Question

A gas can be taken from A to B via two different processes ACB and ADB . <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-ajqoayh0xry9lxmm.jpg" /> When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If the path ADB is used then work done by the system is 10 J , the heat flows into the system in the path ADB is: (A) 100 J (B) 20 J (C) 40 J (D) 80 J

Tardigrade Admin · Accepted Answer

For path ACB , ΔQ=ΔU+ΔW 60=ΔU+30 ⇒ ΔU=30J For path ADB ΔQ=ΔU+ΔW As initial and find points are the same, change in internal energy is same in both the cases ΔQ=30+10 =40 J

$100 J$

$20 J$

$40 J$

$80 J$

For path $A CB$ ,
$Δ Q = Δ U + Δ W$
$60 = Δ U + 30$
$\Rightarrow Δ U = 30 J$
For path $A D B$
$Δ Q = Δ U + Δ W$
As initial and find points are the same, change in internal energy is same in both the cases
$Δ Q = 30 + 10$
$= 40 J$

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

100J

20J

40J

80J

For path ACB , ΔQ=ΔU+ΔW 60=ΔU+30 ⇒ΔU=30J For path ADB ΔQ=ΔU+ΔW As initial and find points are the same, change in internal energy is same in both the cases ΔQ=30+10 =40J

$100 J$

$20 J$

$40 J$

$80 J$

For path $A CB$ ,
$Δ Q = Δ U + Δ W$
$60 = Δ U + 30$
$\Rightarrow Δ U = 30 J$
For path $A D B$
$Δ Q = Δ U + Δ W$
As initial and find points are the same, change in internal energy is same in both the cases
$Δ Q = 30 + 10$
$= 40 J$