Chemical Engineering Thermodynamics - Chemical Engineering Questions and Answers

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Joule-Thomson co-efficient for a perfect gas is

Zero

Positive

Negative

None of these

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Activity co-efficient is a measure of the

Departure from ideal solution behaviour

Departure of gas phase from idea] gas law

Vapour pressure of liquid

None of these

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The main feature of Carnot refrigeration cycle is that, it

Does not need the addition of external work for its functioning

Transfers heat from high temperature to low temperature

Accomplishes the reverse effect of the heat engine

None of these

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

Increased COP

Same COP

Decreased COP

Increased or decreased COP ; depending upon the type of refrigerant

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A refrigerator may be termed as a

Heat pump

Heat engine

Carnot engine

None of these

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In the decomposition of PCl5 represented by, PCl5 ⇋ PCl3 + Cl₂, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

Increase

Decrease

Not alter

None of these

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The four properties of a system viz. P, V, T, S are related by __________ equation.

Gibbs-Duhem

Gibbs-Helmholtz

Maxwell's

None of these

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Melting of ice exemplifies a/an

Adiabatic process

Endothermic reaction

Exothermic reaction

Process involving a chemical reaction

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Entropy change for an irreversible process taking system and surrounding together is

> 0

< 0

None of these