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Thermodynamics — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryThermodynamics1 Mark
MCQ
The pressure-volume work for an ideal gas can be calculated by using the expression $\text{w}=-\int\limits^{\text{V}_\text{f}}_{\text{V}_\text{t}}\text{p}_\text{ex}\text{dV}\ .$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 Vi to Vf . choose the correct option.
  • A
    w (reversible) = w (irreversible
  • B
    w (reversible) < w (irreversible)
  • C
    w (reversible) > w (irreversible)
  • D
    w(reversible) = w (irreversible) $+\text{p}_\text{ex}.\Delta\text{V}$
✓

Answer

  1. w (reversible) < w (irreversible)

Explanation:

Area under the curve is greater in irreversible compression than that of reversible compression.

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