Related Questions

Entropy change of mixing two liquid substances depends upon the
A Molar concentration
B Quantity (i.e. number of moles)
C Both A and B
D Neither A nor B
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:
A ΔH = 0 and ΔS = 0
B ΔH ≠ 0 and ΔS = 0
C ΔH ≠ 0 and ΔS ≠ 0
D ΔH = 0 and ΔS ≠ 0
Entropy of an ideal gas depends upon its
A Pressure
B Temperature
C Both A & B
D Neither A nor B
Entropy change for an irreversible process taking system and surrounding together is
A 0
B > 0
C None of these
A change in state involving a decrease in entropy can be spontaneous, only if
A It is exothermic
B It is isenthalpic
C It takes place isothermally
D It takes place at constant volume
The change of entropy, when heat is absorbed by the gas, is
A Positive
B Negative
C Positive or negative
D None of these
For reversible adiabatic process, change in entropy is
A Maximum
B Minimum
C Zero
D Negative
The entropy change for a spontaneous process is
A > 0 for the system
B > 0 for the system & the surrounding
Entropy of a substance remains constant during a/an __________ change.
A Reversible isothermal
B Irreversible isothermal
C Reversible adiabatic
D None of these
During a reversible isothermal expansion of an ideal gas, the entropy change is
A +ve
B 0
C -ve
D ∞

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