Chemical Engineering Thermodynamics
Co-efficient of Performance (COP) of a refrigerator is the ratio of the

Refrigeration obtained to the work required
Work required to refrigeration obtained
Lower to higher temperature
Higher to lower temperature

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Chemical Engineering Thermodynamics
Claussius-Clayperon equation gives accurate result, when the

Volume in the liquid state is negligible compared with that in the vapour state
All of these
Vapour pressure is relatively low and the temperature does not vary over wide limits
Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

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