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Q.

In free expansion process.a) Work is done on the systemb) work is done by the systemc) work done is zero.

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a

a only

b

b only

c

c only

d

b (or) c

answer is C.

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Detailed Solution

ΔQ=0 in free expansionΔU=0  in free expansionFrom 1st law of thermodynamics ΔQ=ΔU+ΔW0=0+ΔWΔW=0
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In free expansion process.a) Work is done on the systemb) work is done by the systemc) work done is zero.