Throttling (Joule-Thomson effect) process is a constant _____________ process?
Correct answer: A. Enthalpy
- A. Enthalpy
- B. Entropy
- C. Pressure
- D. None of these
Explanation
A throttling valve has no shaft work and normally negligible heat transfer and changes in kinetic or potential energy, so the steady-flow energy balance gives h1 = h2. Thus throttling is an isenthalpic process, not an isentropic one.
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