When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the

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When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the

A. Gibbs-Duhem equation

B. Gibbs-Helmholtz equation

C. Third law of thermodynamics

D. Joule-Thomson effect

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The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.

A. Freezing

B. Triple

C. Boiling

D. Boyle

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Which is an example of closed system?

A. Air compressor

B. Liquid cooling system of an automobile

C. Boiler

D. None of these

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The gas law (PV = RT) is true for an __________ change.

A. Isothermal

B. Adiabatic

C. Both (A) & (B)

D. Neither (A) nor (B)

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The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.

A. Isobaric

B. Isothermal

C. Adiabatic

D. None of these

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The first law of thermodynamics is a restatement of the law of conservation of

A. Mass

B. Energy

C. Momentum

D. None of these

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Which of the following is an extensive property of a system?

A. Heat capacity

B. Molal heat capacity

C. Pressure

D. Concentration

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Pick out the correct equation relating 'F' and 'A'.

A. F = A + PV

B. F = E + A

C. F = A - TS

D. F = A + TS

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The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

A. Expansion of a real gas

B. Reversible isothermal volume change

C. Heating of an ideal gas

D. Cooling of a real gas

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The value of C_p & C_v respectively for monatomic gases in Kcal/kg Mole.°K are

A. 5 & 3

B. 3.987 & 1.987

C. 1.987 & 0.66

D. 0.66 & 1.987

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For a reversible process involving only pressure-volume work

A. (dF)_T, p < 0

B. (dF)_T, p > 0

C. (dF)_T, p = 0

D. (dA)_T, v < 0

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Internal energy change of a system over one complete cycle in a cyclic process is

A. Zero

B. +ve

C. -ve

D. Dependent on the path

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A change in state involving a decrease in entropy can be spontaneous, only if

A. It is exothermic

B. It is isenthalpic

C. It takes place isothermally

D. It takes place at constant volume

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(∂T/∂P)H is the mathematical expression for

A. Specific heat at constant pressure (C_p)

B. Specific heat at constant volume (C_v)

C. Joule-Thompson co-efficient

D. None of these

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The kinetic energy of gas molecule is zero at

A. 0°C

B. 273°C

C. 100°C

D. -273°C

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Standard temperature and pressure (S.T.P.) is

A. 0°C and 750 mm Hg

B. 15°C and 750 mm Hg

C. 0°C and 1 kgf/cm2

D. 15°C and 1 kgf/cm2

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Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

A. Decreases

B. Increases

C. Remains constant

D. Decreases logarithmically

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Specific/molar Gibbs free energy for a pure substance does not change during

A. Sublimation

B. Vaporisation

C. Melting

D. Either (A), (B) or (C)

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Third law of thermodynamics is concerned with the

A. Value of absolute entropy

B. Energy transfer

C. Direction of energy transfer

D. None of these

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The equilibrium constant for a chemical reaction at two different temperatures is given by

A. Kp₂/Kp₁ = - (ΔH/R) (1/T₂ - 1/T₁)

B. Kp₂/Kp₁ = (ΔH/R) (1/T₂ - 1/T₁)

C. Kp₂/Kp₁ = ΔH (1/T₂ - 1/T₁)

D. Kp₂/Kp₁ = - (1/R) (1/T₂ - 1/T₁)

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For spontaneous changes in an isolated system (S = entropy)

A. ds = 0

B. ds <0

C. ds > 0

D. ds = Constant

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Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as

A. P + F - C = 2

B. C = P - F + 2

C. F = C - P - 2

D. P = F - C - 2

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In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

A. 5.2

B. 6.2

C. 0.168

D. Data insufficient, can't be found out

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In Joule-Thomson porous plug experiment, the

A. Enthalpy does not remain constant

B. Entire apparatus is exposed to surroundings

C. Temperature remains constant

D. None of these

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Entropy of a substance remains constant during a/an __________ change.

A. Reversible isothermal

B. Irreversible isothermal

C. Reversible adiabatic

D. None of these

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Normal temperature and pressure (N.T.P.) corresponds to

A. 0°C and 760 mm Hg

B. 15°C and 760 mm Hg

C. 20°C and 760 mm Hg

D. 0°C and 1 kgf/cm²

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Chemical potential is a/an

A. Extensive property

B. Intensive property

C. Force which drives the chemical system to equilibrium

D. Both (B) and (C)

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Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)?

A. Air cycle

B. Carnot cycle

C. Ordinary vapour compression cycle

D. Vapour compression with a reversible expansion engine

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At absolute zero temperature, the __________ of the gas is zero.

A. Pressure

B. Volume

C. Mass

D. None of these

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

A. Doubling the absolute temperature as well as pressure of the gas

B. Reducing pressure to one fourth at constant temperature

C. Reducing temperature to one fourth at constant pressure

D. Reducing the temperature to half and doubling the pressure

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Which of the following represents the Virial equation of state?

A. T = [RT/(V- b)] - [a/√T. V(V + b)]

B. PV/RT = 1 + (B/V) + (C/V²) + ……

C. n₁u₂ + μ₂μ₁ = 0

D. None of these

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Accepted Answer

D. Joule-Thomson effect

When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.

Which is an example of closed system?

The gas law (PV = RT) is true for an __________ change.

The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.

The first law of thermodynamics is a restatement of the law of conservation of

Which of the following is an extensive property of a system?

Pick out the correct equation relating 'F' and 'A'.

The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

The value of C_p & C_v respectively for monatomic gases in Kcal/kg Mole.°K are

For a reversible process involving only pressure-volume work

Internal energy change of a system over one complete cycle in a cyclic process is

A change in state involving a decrease in entropy can be spontaneous, only if

(∂T/∂P)H is the mathematical expression for

The kinetic energy of gas molecule is zero at

Standard temperature and pressure (S.T.P.) is

Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

Specific/molar Gibbs free energy for a pure substance does not change during

Third law of thermodynamics is concerned with the

The equilibrium constant for a chemical reaction at two different temperatures is given by

For spontaneous changes in an isolated system (S = entropy)

Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as

In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

In Joule-Thomson porous plug experiment, the

Entropy of a substance remains constant during a/an __________ change.

Normal temperature and pressure (N.T.P.) corresponds to

Chemical potential is a/an

Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)?

At absolute zero temperature, the __________ of the gas is zero.

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

Which of the following represents the Virial equation of state?

Also checkout

When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.

Which is an example of closed system?

The gas law (PV = RT) is true for an __________ change.

The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.

The first law of thermodynamics is a restatement of the law of conservation of

Which of the following is an extensive property of a system?

Pick out the correct equation relating 'F' and 'A'.

The expression for entropy change given by, ΔS = - nR ln (P2/P1), holds good for

The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are

For a reversible process involving only pressure-volume work

Internal energy change of a system over one complete cycle in a cyclic process is

A change in state involving a decrease in entropy can be spontaneous, only if

(∂T/∂P)H is the mathematical expression for

The kinetic energy of gas molecule is zero at

Standard temperature and pressure (S.T.P.) is

Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

Specific/molar Gibbs free energy for a pure substance does not change during

Third law of thermodynamics is concerned with the

The equilibrium constant for a chemical reaction at two different temperatures is given by

For spontaneous changes in an isolated system (S = entropy)

Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as

In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

In Joule-Thomson porous plug experiment, the

Entropy of a substance remains constant during a/an __________ change.

Normal temperature and pressure (N.T.P.) corresponds to

Chemical potential is a/an

Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)?

At absolute zero temperature, the __________ of the gas is zero.

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

Which of the following represents the Virial equation of state?

Also checkout

The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

The value of C_p & C_v respectively for monatomic gases in Kcal/kg Mole.°K are