Multiple choice general knowledge science & technology

During throttling process which one of the following remains constant?

  1. enthalpy

  2. entropy

  3. temperature

  4. pressure
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A Correct answer
Explanation

In a throttling process (also known as Joule-Thomson expansion), the enthalpy remains constant. This is an isenthalpic process where a fluid expands from high pressure to low pressure through a valve or porous plug without doing external work or heat transfer. Entropy typically increases during throttling.

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