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5 moles of an ideal gas expand isohermally and reversibly from pressure of 10atm to 2atm at 300K. what is largest mass [approx] which can be lifted through hieght 1 m in this expansion?
Work done isothermally in reversible process is given as:W = – nRT * log(P1/P2)put all the values,W = – 5R*300*log(10/2) = > 20 KJ (approx.)W = F x displacement = > mgd where d = 1 m.W = 20,000 = 10mm = 2000/1000 = 2 kg.
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