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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
Specific __________ does not change during phase change at constant temperature and pressure.

Entropy
Enthalpy
Internal energy
Gibbs energy

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Chemical Engineering Thermodynamics
Which is not a refrigerant?

C₂H₄Cl₂
NH₃
CCl₂F₂
SO₂

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Chemical Engineering Thermodynamics
Equilibrium constant decreases as the temperature

Increases, for an exothermic reaction
Decreases, for an exothermic reaction
None of these
Increases, for an endothermic reaction

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Chemical Engineering Thermodynamics
The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is

∞
-ve
+ve

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Chemical Engineering Thermodynamics
Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in

Increased COP
Decreased COP
Same COP
Increased or decreased COP ; depending upon the type of refrigerant

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Chemical Engineering Thermodynamics
What happens in a reversible adiabatic expansion process?

Heating takes place
Temperature is constant
Cooling takes place
Pressure is constant

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