Chemical Engineering Thermodynamics

The adiabatic throttling process of a perfect gas is one of constant enthalpy

  • A. In which there is a temperature drop
  • B. Which is exemplified by a non-steady flow expansion
  • C. Which can be performed in a pipe with a constriction
  • D. In which there is an increase in temperature
Answer: Option C.

The throttling process (joule-expansion) is usually done using an pipe arranged with gate valve and the effect is found at different positions of valve this process is done under steady state and keeping the system in an adiabatic chamber during which due to the obstruction imparted by valve position the gas will lose some pressure energy in to frictional energy and hence the pressure decreases in an throttling experiment always.

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