Chemical Engineering Thermodynamics
The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

Work
None of these
Temperature
Kinematic viscosity

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Chemical Engineering Thermodynamics
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

A homogeneous solution (say of phenol water) is formed
Mutual solubility of the two liquids shows a decreasing trend
None of these
Two liquids are completely separated into two layers

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