Consider the following two statements.

(A): If heat is added to a system, its temperature must increase.
(B): If positive work is done by a system in a thermodynamic process, its volume must increase.
  
1. Both A and B are correct.
2. A is correct but B is wrong.
3. B is correct but A is wrong.
4. Both A and B are wrong.
Subtopic:  Work Done by a Gas |
 54%
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The figure shows the (P-V) diagram of an ideal gas undergoing a change of state from A to B. Four different paths I, II, III and IV, as shown in the figure, may lead to the same change of state.
               

(a) The change in internal energy is the same in cases IV and III but not in cases I and II.
(b) The change in internal energy is the same in all four cases.
(c) Work done is maximum in case I.
(d) Work done is minimum in case II.

 
Which of the following options contains only correct statements?

1. (b), (c), (d) 2. (a), (d)
3. (b), (c) 4. (a), (c), (d)
Subtopic:  Work Done by a Gas |
 78%
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A gas expands from \(\mathrm{i}\) to \(\mathrm{f}\) along the three paths indicated. The work done along the three paths denoted by W1, W2, and W3 have the relationship:
                
1.  W1 < W2< W3

2.  W2 < W1 = W3

3.  W2 < W1 < W3

4.  W1 > W2 > W3

Subtopic:  Work Done by a Gas |
 67%
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