In an ideal gas mixture, fugacity of a species is equal to its

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In an ideal gas mixture, fugacity of a species is equal to its

A. Vapor pressure

B. Partial pressure

C. Chemical potential

D. None of these

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Pick out the wrong statement.

A. At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature

B. Normally, the gases which are easily liquefied are more soluble in common solvents

C. The gases which are capable of forming ions in aqueous solution are much more soluble in water than in other solvents

D. At constant pressure, solubility of a gas in a liquid increases with rise in temperature

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Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

A. d ln p/dt = H_vap/RT²

B. d ln p/dt = RT²/H_vap

C. dp/dt = RT²/H_vap

D. dp/dt = H_vap/RT²

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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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For equilibrium process (i.e. reversible) in an isolated system

A. ds = 0

B. ds < 0

C. ds > 0

D. ds = Constant

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Free energy

A. Decreases in all spontaneous (or irreversible) processes

B. Change during a spontaneous process has a negative value

C. Remains unchanged in reversible processes carried at constant temperature and pressure

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

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If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) C₃H₈(g) will be __________ Kcal.

A. -19.4

B. -30.2

C. 55.2

D. -55.2

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Entropy is a/an

A. State function

B. Macroscopic property

C. Extensive property

D. None of these

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__________ Equation predicts the activity coefficient from experimental data.

A. Lewis-Randall

B. Margules

C. Van Laar

D. Both (B) & (C)

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__________ increases with increase in pressure.

A. The melting point of wax

B. The boiling point of a liquid

C. Both (A) and (B)

D. Neither (A) nor (B)

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Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are

A. Always greater than one

B. Same at the same reduced temperature

C. Same at the same reduced pressure

D. Both (B) & (C)

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Claude's liquefaction process employs the cooling of gases by

A. Expansion in an engine

B. Following a constant pressure cycle

C. Throttling

D. None of these

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

A. Decrease in velocity

B. Decrease in temperature

C. Decrease in kinetic energy

D. Energy spent in doing work

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In jet refrigerators, the refrigerating fluid is practically always

A. Water

B. Ammonia

C. Freon

D. Brine

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Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

A. Solid-vapor

B. Solid-liquid

C. Liquid-vapor

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

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For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

A. 6738.9

B. 6753.5

C. 7058.3

D. 9000

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In the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

A. Increase

B. Decrease

C. Not alter

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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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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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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At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is

A. 1.572

B. 1.9398

C. 3.389

D. 4.238

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Pick out the wrong statement.

A. An ideal liquid or solid solution is defined as one in which each component obeys Raoult's law

B. If Raoult's law is applied to one component of a binary mixture; Henry's law or Raoult's law is applied to the other component also

C. Henry's law is rigorously correct in the limit of infinite dilution

D. None of these

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For a spontaneous process, free energy

A. Is zero

B. Increases

C. Decreases whereas the entropy increases

D. And entropy both decrease

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The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

A. (∂E/∂n_i)_{S, v, nj}

B. (∂G/∂n_i)_{T, P, nj} = (∂A/∂ni) _{T, v, nj}

C. (∂H/∂n_i)_{S, P, nj}

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

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The total change in the enthalpy of a system is independent of the

A. Number of intermediate chemical reactions involved

B. Pressure and temperature

C. State of combination and aggregation in the beginning and at the end of the reaction

D. None of these

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Pick out the wrong statement.

A. Trouton's ratio of non-polar liquids is calculated using Kistyakowsky equation

B. Thermal efficiency of a Carnot engine is always less than 1

C. An equation relating pressure, volume and temperature of a gas is called ideal gas equation

D. None of these

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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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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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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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The most important application of distribution law is in

A. Evaporation

B. Liquid extraction

C. Drying

D. Distillation

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

A. (∂T/∂V)_S = (∂p/∂S)_V

B. (∂T/∂P)_S = (∂V/∂S)_P

C. (∂P/∂T)_V = (∂S/∂V)_T

D. (∂V/∂T)_P = -(∂S/∂P)_T

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Accepted Answer

B. Partial pressure

In an ideal gas mixture, fugacity of a species is equal to its

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Pick out the wrong statement.

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

Pick out the wrong statement:

For equilibrium process (i.e. reversible) in an isolated system

Free energy

If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) C₃H₈(g) will be __________ Kcal.

Entropy is a/an

__________ Equation predicts the activity coefficient from experimental data.

__________ increases with increase in pressure.

Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are

Claude's liquefaction process employs the cooling of gases by

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

In jet refrigerators, the refrigerating fluid is practically always

Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

In the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

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

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

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)

Pick out the wrong statement.

For a spontaneous process, free energy

The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

The total change in the enthalpy of a system is independent of the

Pick out the wrong statement.

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

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

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

The most important application of distribution law is in

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

Also checkout

In an ideal gas mixture, fugacity of a species is equal to its

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Pick out the wrong statement.

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

Pick out the wrong statement:

For equilibrium process (i.e. reversible) in an isolated system

Free energy

If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) C3H8(g) will be __________ Kcal.

Entropy is a/an

__________ Equation predicts the activity coefficient from experimental data.

__________ increases with increase in pressure.

Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are

Claude's liquefaction process employs the cooling of gases by

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

In jet refrigerators, the refrigerating fluid is practically always

Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

In the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

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

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

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)

Pick out the wrong statement.

For a spontaneous process, free energy

The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

The total change in the enthalpy of a system is independent of the

Pick out the wrong statement.

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

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

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

The most important application of distribution law is in

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

Also checkout

If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) C₃H₈(g) will be __________ Kcal.

In the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.