CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

Critical temperature is defined as the temperature above which a gas will

None of these

Immediately liquify

Not liquify (barring exceptions)

Never liquify however high the pressure may be

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What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?

3

2

1

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__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.

Bucket

Throttling

A combination of separating & throttling

Separating

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Domestic refrigerator usually works on the __________ refrigeration cycle.

Vapour-ejection

Air

Absorption

Carnot

TRUE ANSWER : ?
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Entropy change in case of reversible adiabatic process is

Maximum

Indeterminate

Zero

Minimum

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The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in

A closed system with changes in composition

An open system with changes in composition

An open system of constant composition

A closed system of constant composition

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Joule-Thomson Co-efficient at any point on the inversion curve is

+ ve

∞

-ve

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Claussius-Clayperon equation gives accurate result, when the

Volume in the liquid state is negligible compared with that in the vapour state

Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

All of these

Vapour pressure is relatively low and the temperature does not vary over wide limits

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In a reversible process

Tds = dE + dW

DE - dW = Tds

DW - dE = Tds

Tds - dW + dE >0

TRUE ANSWER : ?
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Equation which relates pressure, volume and temperature of a gas is called the

Equation of state

Ideal gas equation

Gibbs Duhem equation

None of these

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