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Crystal System and Bravais Lattice

1 mole of a g...

Question

1 mole of a gas occupying 3 litres volume is expanded against a constant external pressure of 1 atmosphere to a volume of 15 litre calculate the work done by the system

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Solution

Work done by a system against an external pressure can be described by the following equation:

w= -P_ext∆V
1atm = 101300 Pa , 1 L = 0.001m³

Therefore,

w = - (101300) (0.015 - 0.003)
w = - (101300) (0.012)
w = -1215.6 J = -1.215 x 10³J

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