• # question_answer 43)   The pressure-volume work for an ideal gas can be calculated by using the expression $w=-\int\limits_{{{V}_{i}}}^{{{V}_{f}}}{{{p}_{ex}}dV.}$. The work can also be calculated from the pV-plot by using the area under the curve within the specified limits. When an ideal gas is compressed (a) reversibly or (b) irreversibly from volume ${{V}_{i}}$ to ${{V}_{f}}$, choose the correct option: (a) w (reversible) = w (irreversible)                         (b) w (reversible) < w (irreversible) (c) w (reversible) > w (irreversible)                          (d) w (reversible) = w (irreversible) +${{p}_{ex}}\cdot \Delta V$

(b) $w$ (reversible) < $w$ (irreversible)   Area under the curve is greater in irreversible compression than that of reversible compression.

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