CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

When a gas is subjected to adiabatic expansion, it gets cooled due to

Decrease in velocity

Energy spent in doing work

Decrease in temperature

Decrease in kinetic energy

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Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the

Heat of formation

Calorific value

Heat of reaction

Heat of combustion

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PVy = constant, holds good for an isentropic process, which is

Reversible and isothermal

Adiabatic and irreversible

Isothermal and irreversible

Reversible and adiabatic

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Which of the following will increase the volume of a real gas by four times ?

Reducing pressure to one fourth at constant temperature

Reducing temperature to one fourth at constant pressure

Doubling the absolute temperature as well as pressure of the gas

Reducing the temperature to half and doubling the pressure

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For an irreversible process involving only pressure-volume work

(dF)T, p

(dF)T, p = 0

(dA)T, v >0

(dF)T, p > 0

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YOUR ANSWER : ?

What is the value of Joule-Thomson co-efficient for an ideal gas?

∞

+ve

-ve

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Degree of freedom of a system consisting of a gaseous mixture of H₂ and NH₃ will be

1

0

2

3

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The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzman's constant, T = absolute temperature)

3KT/m

√(3KT/m)

√(2KT/m)

√(6KT/m)

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Which of the following is not affected by temperature changes?

Fugacity

Free energy

Activity co-efficient

None of these

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Number of phases in a colloidal system are

4

1

2

3

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