“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?
(A) Third law of thermodynamics
(B) Second law of thermodynamics
(C) Nernst heat theorem
(D) Maxwell’s relations
On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?
(A) (∂P/∂V)S = (∂P/∂V)T
(B) (∂P/∂V)S = [(∂P/∂V)T]Y
(C) (∂P/∂V)S = y(∂P/∂V)T
(D) (∂P/∂V)S = 1/y(∂P/∂V)T
An irreversible process____________________?
(A) Is the analog of linear frictionless motion in machines
(B) Is an idealised visualisation of behaviour of a system
(C) Yields the maximum amount of work
(D) Yields an amount of work less than that of a reversible process
When a system is in equilibrium for all possible processes, the differential or finite change of entropy is__________________?
(A) < 0
(B) > 0
(C) = 0
(D) None of these
Ideal refrigeration cycle is____________________?
(A) Same as Carnot cycle
(B) Same as reverse Carnot cycle
(C) Dependent on the refrigerant’s properties
(D) The least efficient of all refrigeration processes
Cv for an ideal gas__________________?
(A) Does not depend upon temperature
(B) Is independent of pressure only
(C) Is independent of volume only
(D) Is independent of both pressure and volume
Throttling process is a/an _____________ process?
(A) Reversible and isothermal
(B) Irreversible and constant enthalpy
(C) Reversible and constant entropy
(D) Reversible and constant enthalpy
(∂T/∂P)H is the mathematical expression for__________________?
(A) Specific heat at constant pressure (Cp)
(B) Specific heat at constant volume (Cv)
(C) Joule-Thompson co-efficient
(D) None of these
In jet refrigerators, the refrigerating fluid is practically always_________________?
(A) Water
(B) Ammonia
(C) Freon
(D) Brine
Gibbs phase rule finds application, when heat transfer occurs by___________________?
(A) Conduction
(B) Convection
(C) Radiation
(D) Condensation