High pressure steam is expanded adiabati-cally and reversibly through – McqOptions

MCQOPTIONS

1.	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 ? H and ? S respectively for this process:
A.	? H = 0 and ? S = 0.
B.	? H ? 0 and ? S = 0.
C.	? H ? 0 and ? S ? 0.
D.	? H = 0 and ? S ? 0.
Answer» C. ? H ? 0 and ? S ? 0.

Discussion

No Comment Found

Related MCQs

Partial molal free energy of an element A in solution is same as its
The unity of Planck\'s constant \'h\' in the equation, E = hv is
In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when
C p of a gas at its critical temperature and pressure
Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . Â°K
In the decomposition of PCl 5 represented by, PCl 5 PCl 3 + Cl 2 , decrease in the pressure of the system will __________ the degree of dissociation of PCl 5 .
PV y = constant, holds good for an isentropic process, which is
At 60Â° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60Â° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is
As pressure approaches zero, the ratio of fugacity to pressure ( f / P ) for a gas approaches
Helmholtz free energy ( A ) is defined as