During throttling, which thermodynamic property does not change?

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SSC JE ME Previous Paper 2 ( Held on: 22 Jan 2018 Evening)
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  1. Entropy
  2. Enthalpy
  3. Internal energy
  4. Pressure

Answer (Detailed Solution Below)

Option 2 : Enthalpy
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The process in which high-pressure fluid is converted to low-pressure by using a throttle valve is Throttling. In the throttling process enthalpy remains constant, and work done is zero.

For ideal gas throttling process is isothermal and for real gases due to throttling the temperature may increase decrease or remain constant. For steam due to throttling the temperature always drops.
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