When a gas in a vessel expands, its internal energy decreases. The process involved is

Question

When a gas in a vessel expands, its internal energy decreases. The process involved is

A. Reversible

B. Irreversible

C. Isothermal

D. Adiabatic

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

A. 0

B. > 0

C. < 0

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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Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)

A. λb/Tb

B. Tb/λb

C. √(λb/Tb)

D. √(Tb/λb)

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

A. Zero

B. Unity

C. Infinity

D. An indeterminate value

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COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

A. 0.5

B. 3.5

C. 4.5

D. 8.5

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The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

A. A . x₂²

B. Ax₁

C. Ax₂

D. Ax₁²

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The internal energy of an incompressible fluid depends upon its

A. Pressure

B. Temperature

C. Both (A) & (B)

D. Neither (A) nor (B)

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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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Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.

A. Below

B. At

C. Above

D. Either 'b' or 'c'

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At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is

A. Zero

B. One

C. Infinity

D. Negative

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Van Laar equation deals with the activity coefficients in

A. Binary solutions

B. Ternary solutions

C. Azeotropic mixture only

D. None of these

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

A. C_V

B. Entropy change

C. Gibbs free energy

D. None of these

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To obtain integrated form of Clausius-Clapeyron equation, ln (P₂/P₁) = (ΔH_V/R) (1/T₁ - 1/T₂) from the exact Clapeyron equation, it is assumed that the

A. Volume of the liquid phase is negligible compared to that of vapour phase

B. Vapour phase behaves as an ideal gas

C. Heat of vaporisation is independent of temperature

D. All (A), (B) & (C)

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Which of the following is affected by the temperature?

A. Fugacity

B. Activity co-efficient

C. Free energy

D. All (A), (B) & (C)

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Kopp's rule is used to calculate the heat capacity of

A. Solids

B. Liquids

C. Gases

D. All (A), (B) & (C)

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Joule-Thomson experiment is

A. Isobaric

B. Adiabatic

C. Isenthalpic

D. Both (B) & (C)

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Pick out the wrong statement.

A. Activity co-efficient is dimensionless.

B. In case of an ideal gas, the fugacity is equal to its pressure.

C. In a mixture of ideal gases, the fugacity of a component is equal to the partial pressure of the component.

D. The fugacity co-efficient is zero for an ideal gas

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An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done during the cycle is

A. PV

B. 2PV

C. PV/2

D. 0

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Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is

A. (T₂ - T₁)/T₂

B. (T₂ - T₁)/T₁

C. (T₁ - T₂)/T₂

D. (T₁ - T₂)/T₁

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In an ideal solution, the activity of a component equals its

A. Mole fraction

B. Fugacity at the same temperature and pressure

C. Partial pressure

D. None of these

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Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the

A. Low pressure and high temperature

B. Low pressure and low temperature

C. High pressure and low temperature

D. High pressure and high temperature

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Generation of heat by friction is an example of a/an __________ change.

A. Isothermal

B. Irreversible

C. Adiabatic

D. Reversible

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An irreversible process

A. Is the analog of linear frictionless motion in machines

B. Is an idealised visualisation of behaviour of a system

C. Yields the maximum amount of work

D. Yields an amount of work less than that of a reversible process

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The most important application of distribution law is in

A. Evaporation

B. Liquid extraction

C. Drying

D. Distillation

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4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is

A. 4 J

B. ∞

C. 0

D. 8 J

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All gases during throttling process at atmospheric temperature and pressure show a cooling effect except

A. CO₂

B. H₂

C. O₂

D. N₂

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The internal energy of an ideal gas does not change in a reversible __________ process.

A. Isothermal

B. Adiabatic

C. Isobaric

D. Isometric

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Extensive properties of a thermodynamic system depend upon the __________ of the system.

A. Specific volume

B. Temperature

C. Mass

D. Pressure

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Pick out the wrong statement:

A. The expansion of a gas in vacuum is an irreversible process

B. An isometric process is a constant pressure process

C. Entropy change for a reversible adiabatic process is zero

D. Free energy change for a spontaneous process is negative

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The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

A. Increases

B. Decreases

C. Remains unchanged

D. Decreases linearly

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Accepted Answer

A. Reversible

When a gas in a vessel expands, its internal energy decreases. The process involved is

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

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

Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)

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

COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

The internal energy of an incompressible fluid depends upon its

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

Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.

At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is

Van Laar equation deals with the activity coefficients in

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

To obtain integrated form of Clausius-Clapeyron equation, ln (P₂/P₁) = (ΔH_V/R) (1/T₁ - 1/T₂) from the exact Clapeyron equation, it is assumed that the

Which of the following is affected by the temperature?

Kopp's rule is used to calculate the heat capacity of

Joule-Thomson experiment is

Pick out the wrong statement.

An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done during the cycle is

Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is

In an ideal solution, the activity of a component equals its

Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the

Generation of heat by friction is an example of a/an __________ change.

An irreversible process

The most important application of distribution law is in

4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is

All gases during throttling process at atmospheric temperature and pressure show a cooling effect except

The internal energy of an ideal gas does not change in a reversible __________ process.

Extensive properties of a thermodynamic system depend upon the __________ of the system.

Pick out the wrong statement:

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

Also checkout

When a gas in a vessel expands, its internal energy decreases. The process involved is

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

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

Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)

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

COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is

The internal energy of an incompressible fluid depends upon its

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

Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.

At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is

Van Laar equation deals with the activity coefficients in

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

To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (ΔHV/R) (1/T1 - 1/T2) from the exact Clapeyron equation, it is assumed that the

Which of the following is affected by the temperature?

Kopp's rule is used to calculate the heat capacity of

Joule-Thomson experiment is

Pick out the wrong statement.

An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done during the cycle is

Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is

In an ideal solution, the activity of a component equals its

Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the

Generation of heat by friction is an example of a/an __________ change.

An irreversible process

The most important application of distribution law is in

4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is

All gases during throttling process at atmospheric temperature and pressure show a cooling effect except

The internal energy of an ideal gas does not change in a reversible __________ process.

Extensive properties of a thermodynamic system depend upon the __________ of the system.

Pick out the wrong statement:

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

Also checkout

The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

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

To obtain integrated form of Clausius-Clapeyron equation, ln (P₂/P₁) = (ΔH_V/R) (1/T₁ - 1/T₂) from the exact Clapeyron equation, it is assumed that the

Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is