CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

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

Throttling

Separating

A combination of separating & throttling

Bucket

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YOUR ANSWER : ?

Which of the following identities can be most easily used to verify steam table data for superheated steam.

(∂P/∂T)V = (∂S/∂V)T

(∂T/∂P)S = (∂V/∂S)P

(∂V/∂T)P = -(∂S/∂P)T

(∂T/∂V)S = (∂p/∂S)V

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Equilibrium constant decreases as the temperature

None of these

Increases, for an endothermic reaction

Decreases, for an exothermic reaction

Increases, for an exothermic reaction

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If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero

Both of the listed here

None of thr listed here

Volume

Enthalpy

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Refrigerants commonly used for domestic refrigerators are

Ethyl chloride or methyle chloride

Propane

NH₃ or CO₂

Freon-12

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At absolute zero temperature, all substances have the same

Heat capacity

None of these

Entropy

Crystalline structure

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Adiabatic compression of a saturated water vapour makes it

Superheated

Both A and B

Supersaturated

Neither A nor B

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Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

273

25

None of these

0

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As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches

An indeterminate value

Unity

Infinity

Zero

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Isobaric process means a constant process.

Volume

Pressure

Entropy

Temperature

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