Chemical Engineering Thermodynamics
Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?

Vapour compression with a reversible expansion engine
Air cycle
Ordinary vapour compression cycle
Carnot cycle

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Chemical Engineering Thermodynamics
Which of the following is true for Virial equation of state?

Virial co-efficients are universal constants
Virial co-efficients
For some gases, Virial equations and ideal gas equations are the same
Virial co-efficients are function of temperature only

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