High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process ?
Correct answer: B. Δ H ≠ 0 and ΔS = 0
- A. Δ H = 0 and ΔS = 0
- B. Δ H ≠ 0 and ΔS = 0
- C. Δ H ≠ 0 and ΔS ≠ 0
- D. Δ H = 0 and ΔS ≠ 0
Explanation
Adiabatic operation gives no heat transfer, while reversibility makes the entropy change zero. Since the turbine produces shaft work, the fluid enthalpy must decrease, so ΔH is nonzero.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Engineering Thermodynamics
598 free Chemical Engineering Thermodynamics MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
Related questions
"The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements." This is the statement of___________________?
The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases?
Clausius Clapeyron equation applies to the _____________ process?
_________________ chart is a graph related to Antoine equation ?
If a solution of eutectic composition is cooled, _______________ reaching the eutectic temperature ?