Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?
(A) Positive
(B) Negative
(C) Zero
(D) Infinity
Which of the following non-flow reversible compression processes require maximum work ?
(A) Adiabatic process
(B) Isothermal process
(C) Isobaric process
(D) All require same work
In an ideal solution, the activity of a component equals its __________________?
(A) Mole fraction
(B) Fugacity at the same temperature and pressure
(C) Partial pressure
(D) None of these
During adiabatic expansion of gas___________________?
(A) Pressure remains constant
(B) Pressure is increased
(C) Temperature remains constant
(D) None of these
Fugacity is most helpful in____________________?
(A) Representing actual behaviour of real gases
(B) Representing actual behaviour of ideal gases
(C) The study of chemical equilibria involving gases at atmospheric pressure
(D) None of these
Enthalpy changes over a constant pressure path are always zero for ______________ gas?
(A) Any
(B) A perfect
(C) An easily liquefiable
(D) A real
The most important application of distribution law is in_____________________?
(A) Evaporation
(B) Liquid extraction
(C) Drying
(D) Distillation
Which is an example of closed system ?
(A) Air compressor
(B) Liquid cooling system of an automobile
(C) Boiler
(D) None of these
Work done in an adiabatic process between two states depends on the__________________?
(A) Rate of heat transmission
(B) Initial state only
(C) End states only
(D) None of these
For an ideal gas, the enthalpy__________________?
(A) Increases with rise in pressure
(B) Decreases with rise in pressure
(C) Is independent of pressure
(D) Is a path function