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Question

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


  1. -4.0 X 102

  2. 4.0 X 102 J

  3. 0 J

  4. - 3.0 X102


Solution

The correct option is C

0 J


W = P(V2  V1)

in vaccum Pext = 0

W = 0

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