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BITSAT 2022
Exam
BITSAT
Year
2022
Subject
Chemistry
Chapter
Thermodynamics (C)

BITSAT 2022 · Chemistry · Thermodynamics (C)

In an adiabatic process, no transfer of heat takes place between...

In an adiabatic process, no transfer of heat takes place between system and surrounding. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.

Options

  1. Aq=0,ΔT≠0,W=0q=0, \Delta T \neq 0, W=0
  2. Bq≠0,ΔT=0,W=0q \neq 0, \Delta T=0, W=0
  3. Cq=0,ΔT=0,W=0q=0, \Delta T=0, W=0
  4. Dq=0,ΔT<0,W≠0q=0, \Delta T < 0, W \neq 0

Correct answer

C. q=0,ΔT=0,W=0q=0, \Delta T=0, W=0

Step-by-step solution

Free expansion, W=0W=0 Adiabatic process, q=0ΔU=q+W=0q=0\Delta U=q+W=0, this means that internal energy remains constant. Therefore, ΔT=0\Delta T=0 in ideal gas there is no intermolecular attraction. Hence, when such a gas expands under adiabatic conditions into a vacuum, no heat is absorbed or evolved, since no external work is done to separate the molecules.
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