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State and Path Variables, Functions

Calculate the...

Question

Calculate the work done by the gas in the state diagram shown

A

30J

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B

20J

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C

-20J

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D

-10J

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Solution

The correct option is D
-10J

Work done= Area under the P - V cure

W=(80kPa) $(250 \times 10^{- 6}) \times 1 / 2 = 10 J$

Since the arrow is anticlockwise.

$∴$ Work done = - 10 J

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