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A cyclic proces ABCD is shown in PV diagram for an ideal gas.
Which of the following diagram represents the same process
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A cyclic proces ABCD is shown in PV diagram for an ideal gas.Which of ...
In such type of graph conversions, the best way to work is to make a parameter constant and then derive the results between others.

Let us make pressure constant. Then we have, VB>VA  
Or
(nrTA/P)<(nrTB/P) or TA<TB
In terms of V-T curve, the thing happens as follow:-
 A to B (Volume increase from VA to VB. No change in pressure). B to C (temperature is constant), C to D (Volume remains constant) and D to A (Volume decreases but temperature remains constant. However the constant value is less than from B to C). On these all conditions, only graph d stands.
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A cyclic proces ABCD is shown in PV diagram for an ideal gas.Which of ...
In such questions firstly draw a table of P,V,T like here from A to B pressure is constant and volume is increasing therefore by ideal gas eq. temp. will also increase. Then from B to C press. is decreasing and volume is increasing, so temp. is constant .Further pressure is decreasing and volume is constant so by ideal gas eq. temp. will also decrease and in the last from C to D pressure is increasing and volume is decreasing so temperature again constant. Now using the relation between volume and temperature plot the graph.
In such questions always just find the relation between P, V,and T.
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A cyclic proces ABCD is shown in PV diagram for an ideal gas.Which of ...
When you observe the diagram carefully and draw it like a straight lines without any change in the process. option d) is only correct. observe carefully.
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A cyclic proces ABCD is shown in PV diagram for an ideal gas.Which of the following diagram represents the same processa)b)c)d)Correct answer is option 'D'. Can you explain this answer?
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