The minimum number of phases that can exist in a system is________________?
The minimum number of phases that can exist in a system is________________?
A. 0
B. 1
C. 2
D. 3
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Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass ?
Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass ?A. dE = Tds – PdV
B. dQ = CvdT + PdV
C. dQ = CpdT + Vdp
D. Tds = dE – PdVLowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in__________________?
Lowering of condenser temperature (keeg the evaporator temperature constant) in case of vapour compression refrigeration system results in__________________?A. Increased COP
B. Same COP
C. Decreased COP
D. Increased or decreased COP; depending upon the type of refrigerantMinimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is__________________?
Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is__________________?A. 1
B. 2
C. 3
D. 4Linde gas liquefaction process employs cooling ____________________?
Linde gas liquefaction process employs cooling ____________________?A. By throttling
B. By expansion in an engine
C. At constant pressure
D. None of theseIn a working refrigerator, the value of COP is always__________________?
In a working refrigerator, the value of COP is always__________________?A. 0
B. < 0
C. < 1
D. > 1Gibbs free energy of mixing at constant pressure and temperature is always__________________?
Gibbs free energy of mixing at constant pressure and temperature is always__________________?A. 0
B. ∞
C. + ve
D. – ve