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Chemical Engineering - Chemical Engineering Thermodynamics

Exercise : Chemical Engineering Thermodynamics - Section 9
41.
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg . K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is
superheated vapour.
partially condensed vapour with quality of 0.9.
saturated vapour.
partially condensed vapour with quality of 0.1.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
An isentropic process is carried out at constant
volume
pressure
temperature
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.
oxygen
nitrogen
air
hydrogen
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
High pressure steam is expanded adiabati-cally 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:
Δ H = 0 and ΔS = 0.
Δ H ≠ 0 and ΔS = 0.
Δ H ≠ 0 and ΔS ≠ 0.
Δ H = 0 and ΔS ≠ 0.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The necessary condition for phase equilibrium in a multiphase system of N components is that the
chemical potentials of a given component should be equal in all phases.
chemical potentials of all components should be same in a particular phase.
sum of the chemical potentials of any given component in all the phases should be the same.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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