Posted by frank fred on Wednesday, March 21, 2012 at 12:28pm.
At constant temperature, P*V = constant and
P dV = - V dP = -nRT/P*dP
Work done is therefore
Integral P dV = -(nRT) dP/P
= (-nRT) ln P2/P1
= nRT*ln(P1/P2)
= 2.0 moles*RT*ln5
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