Chemical Engineering Thermodynamics
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
Saturated vapour
Partially condensed vapour with quality of 0.1
Partially condensed vapour with quality of 0.9

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Chemical Engineering Thermodynamics
It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.

Work alone can not bring out such a change of state
The amount of work needed is path dependent
The amount of work needed is independent of path
More information is needed to conclude anything about the path dependence or otherwise of the work needed

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