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Q.

One mole of an ideal gas at 25'c expands in volume from 1.0L to 4.0L at constant temperature .what work (in J) is done if the gas expands against vacuum (Pexternal  =0)?

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a

−1.0×102

b

−4.0×102

c

−3.0×102

d

Zero

answer is D.

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Detailed Solution

w=−∫PdV=0 external pressure is zero so work done is zero

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