Entropy is a measure of the _____________ of a system?
(A) Disorder
(B) Orderly behaviour
(C) Temperature changes only
(D) None of these
An isentropic process is carried out at constant____________________?
(A) Volume
(B) Pressure
(C) Temperature
(D) All (A),
The total change in the enthalpy of a system is independent of the _______________________?
(A) Number of intermediate chemical reactions involved
(B) Pressure and temperature
(C) State of combination and aggregation in the beginning and at the end of the reaction
(D) None of these
For a multi-component system, the term chemical potential is equivalent to the ___________________?
(A) Molal concentration difference
(B) Molar free energy
(C) Partial molar free energy
(D) Molar free energy change
A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect ?
(A) Vapor compression cycle using expansion valve
(B) Air refrigeration cycle
(C) Vapor compression cycle using expansion engine
(D) Carnot refrigeration cycle
Fugacity co-efficient of a substance is the ratio of its fugacity to__________________?
(A) Mole fraction
(B) Activity
(C) Pressure
(D) Activity co-efficient
As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is_________________?
(A) Not changed
(B) Decreasing
(C) Increasing
(D) Data sufficient, can’t be predicted
The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?
(A) 100,000 kW
(B) 160,000 kW
(C) 200,000 kW
(D) 320,000 kW