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The P - V diagram of a system undergoing...

The P - V diagram of a system undergoing thermodynamic transformation is shown in figure . The work done on the system in going from `ArarrBrarrC` is 50 J and 20 cal heat is given to the system . The change in internal energy between A and C is -

A

34 J

B

70 J

C

84 J

D

134 J

Text Solution

Verified by Experts

The correct Answer is:
D
`Delta Q = 20xx4.2` = 84 J
`Delta W= -50J` (due anticlockwise direction)
`Delta Q=Delta U+Delta W`
`implies Delta U=84-(-50)` = 134 J.
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