1 mole of a gas is allowed to expand freely in vacuum at 300 K. The work done during the process is:

300 J

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300 kJ

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zero

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can't be predicted

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Solution

The correct option is C zero
1 mole of a gas is allowed to expand freely in vacuum at 300 K. The work done during the process is zero.
When the expansion occurs in vacuum, $P_{e x t} = 0$
$W = - P_{e x t} (V_{2} - V_{1}) = - 0 \times (V_{2} - V_{1}) = 0$

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