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    Qadim Rao Bhargava
    Qadim Rao Bhargava
    Asked: 3 years agoIn:

    If the boundary of system moves by an infinitesimal amount, the work involved is given by `dw=-P_(“ext”)dV`
    for irreversible process `w=-P_(“ext”)DeltaV ” “( “where “DeltaV=V_(f)-V_(i))`
    for reversible process `P_(“ext”)=P_(“int”)pmdP~=P_(“int”)`
    so for reversible isothermal process `w = -nRTln.(V_(f))/(V_(i))`
    2mole of an ideal gas undergoes isothermal compression along three different plaths :
    (i) reversible compression from `P_(i)=2` bar and `V_(i) = 8L` to `P_(f) = 20` bar
    (ii) a single stage compression against a constant external pressure of 20 bar, and
    (iii) a two stage compression consisting initially of compression against a constant external pressure of 10 bar until `P_(“gas”)=P_(“ext”)`, followed by compression against a constant pressure of 20 bar until `P_(“gas”) = P_(“ext”)`
    Work done (in bar-L) on the gas in reversible isothermal compression is :
    A. 9.212
    B. 36.848
    C. 18.424
    D. None of these

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