Chemical Engineering Thermodynamics Questions

• High __________ is an undesirable property for a good refrigerant.
• All gases during throttling process at atmospheric temperature and pressure show a cooling effect except
• The expression, , gives the free energy change
• 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.
• In jet refrigerators, the refrigerating fluid is practically always
• For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.
• Van Laar equation deals with the activity co-efficients in
• Which of the following is not an intensive property?
• "At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero". This follows from the
• Boyle's law for gases states that
• For a spontaneous process, free energy
• Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇌ PCl3 + Cl2.Degree of dissociation of PCl5 will
• Pick out the correct statement:
• 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?
• The accentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is always
• Entropy is a measure of the __________ of a system.
• Water on heating from 1 to 4°C
• Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
• __________ increases with increase in pressure.
• The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.