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Question

An ideal gas expands in volume from 103m3 to 102m3 at 300K against a constant pressure at 105N/m2. The work done is:

A
900J
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B
900kJ
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C
270kJ
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D
600kJ
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Solution

The correct option is C 900J
As we know that, work done due to change in volume against constant pressure is given as-

W=Pext.ΔV

Given:-

Vi=103m3

Vf=102m3

Pext.=105N/m2

W=105(102103)=900J

Hence, the correct option is A

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