Q.

For an isothermal free expansion of an ideal gas into vacuum, which of the following is/are correct?

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a

w < 0

b

q = 0

c

w = 0

d

dU = 0

answer is A, B, C.

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Detailed Solution

Isothermal process 
dT = 0, dU = 0 
Free expansion 
Pext = 0; dw = 0
Flot
dU = dq + dw
dq = 0

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