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At thermodynamics process of uncontrolled change satisfying the equation Q=W=0 , is [Q= heat supplied, W= work done ]

Options

  1. AFree expansion
  2. BCyclic
  3. CIsochoric
  4. DIsothermal

Correct answer

A. Free expansion

Step-by-step solution

i. Free expansions are adiabatic expansions thus there is no exchange of heat between a system and its environment. ii. Also, there is no work done on the system or by the system. Q=W=0 , and according to the first law of thermodynamics, U=0 iii. For example, when a balloon is ruptured suddenly, or a tire is suddenly punctured, the air inside rushes out rapidly but there is no displacement of a piston or any other surface. iv. A free expansion is different than other thermodynamic processes because it is an uncontr

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