Gibbs-Duhem equation

Question

Gibbs-Duhem equation

A. States that n₁dμ₁ + n₂dμ₂ + ....n_jdμ_j = 0, for a system of definite composition at constant temperature and pressure

B. Applies only to binary systems

C. Finds no application in gas-liquid equilibria involved in distillation

D. None of these

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Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

A. Positive

B. Negative

C. Zero

D. Infinity

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Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

A. 0

B. ∞

C. +ve

D. -ve

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The extensive properties are

A. Volume, mass and number of moles

B. Free energy, entropy and enthalpy

C. Both (A) and (B)

D. None of these

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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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(∂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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Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of

A. Fusion

B. Vaporisation

C. Transition

D. None of these

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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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A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is

A. 349

B. 651

C. 667

D. 1000

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All gases above its inversion temperature, in a throttling process will show

A. A heating effect

B. No change in temperature

C. A cooling effect

D. Either (A) or (C)

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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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Boyle's law for gases states that

A. P ∝ 1/V, when temperature is constant

B. P ∝ 1/V, when temperature & mass of the gas remain constant

C. P ∝ V, at constant temperature & mass of the gas

D. P/V = constant, for any gas

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Gibbs free energy at constant pressure and temperature under equilibrium conditions is

A. ∞

B. 0

C. Maximum

D. Minimum

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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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Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

A. 1

B. 2

C. 3

D. 4

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__________ functions are exemplified by heat and work.

A. Path

B. Point

C. State

D. None of these

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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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The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

A. Unity

B. Activity

C. Both (A) & (B)

D. Neither (A) nor (B)

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Rotary lime kiln is an example of a/an __________ system.

A. Closed

B. Open

C. Isolated

D. Non-thermodynamic

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The third law of thermodynamics states that the

A. Heat capacity of a crystalline solid is zero at absolute zero temperature

B. Heat transfer from low temperature to high temperature source is not possible without external work

C. Gases having same reduced properties behaves similarly

D. None of these

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In the equation, PVⁿ = constant, if the value of n is in between 1 and y (i.e. C_p/C_v), then it represents a reversible __________ process.

A. Isometric

B. Polytropic

C. Isentropic

D. Isobaric

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

A. Enthalpy

B. Volume

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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A system is said to be at equilibrium, if the entropy of the system has reached __________ value.

A. Minimum

B. Zero

C. Maximum

D. None of these

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Refrigeration capacity of a household refrigerator may be round about __________ tons.

A. 0.15

B. 1.5

C. 4.5

D. 6.5

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The thermodynamic law, PV^y = constant, is not applicable in case of

A. Ideal compression of air

B. Free expansion of an ideal gas

C. Adiabatic expansion of steam in a turbine

D. Adiabatic compression of a perfect gas

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A system is said to be isopiestic, if there is no __________ change.

A. Temperature

B. Pressure

C. Volume

D. None of these

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Which law of the thermodynamics provides basis for measuring the thermodynamic property?

A. First law

B. Zeroth law

C. Third law

D. Second law

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In the reaction; N₂ + O₂ 2NO, increasing the pressure will result in

A. Shifting the equilibrium towards right

B. Shifting the equilibrium towards left

C. No change in equilibrium condition

D. None of these

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Which of the following exemplifies an adiabatic process?

A. Melting of ice

B. Condensation of alcohol vapor

C. Sudden bursting of a cycle tube

D. Evaporation of water

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1st law of thermodynamics is nothing but the law of conservation of

A. Momentum

B. Mass

C. Energy

D. None of these

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Accepted Answer

A. States that n₁dμ₁ + n₂dμ₂ + ....n_jdμ_j = 0, for a system of definite composition at constant temperature and pressure

Gibbs-Duhem equation

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

The extensive properties are

Which of the following is affected by the temperature?

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

Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of

Which of the following represents the Virial equation of state?

A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is

All gases above its inversion temperature, in a throttling process will show

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

Boyle's law for gases states that

Gibbs free energy at constant pressure and temperature under equilibrium conditions is

Entropy is a/an

Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

__________ functions are exemplified by heat and work.

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

The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

Rotary lime kiln is an example of a/an __________ system.

The third law of thermodynamics states that the

In the equation, PVⁿ = constant, if the value of n is in between 1 and y (i.e. C_p/C_v), then it represents a reversible __________ process.

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

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 system is said to be at equilibrium, if the entropy of the system has reached __________ value.

Refrigeration capacity of a household refrigerator may be round about __________ tons.

The thermodynamic law, PV^y = constant, is not applicable in case of

A system is said to be isopiestic, if there is no __________ change.

Which law of the thermodynamics provides basis for measuring the thermodynamic property?

In the reaction; N₂ + O₂ 2NO, increasing the pressure will result in

Which of the following exemplifies an adiabatic process?

1st law of thermodynamics is nothing but the law of conservation of

Also checkout

Gibbs-Duhem equation

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

The extensive properties are

Which of the following is affected by the temperature?

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

Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of

Which of the following represents the Virial equation of state?

A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is

All gases above its inversion temperature, in a throttling process will show

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

Boyle's law for gases states that

Gibbs free energy at constant pressure and temperature under equilibrium conditions is

Entropy is a/an

Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

__________ functions are exemplified by heat and work.

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

The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

Rotary lime kiln is an example of a/an __________ system.

The third law of thermodynamics states that the

In the equation, PVn = constant, if the value of n is in between 1 and y (i.e. Cp/Cv), then it represents a reversible __________ process.

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

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 system is said to be at equilibrium, if the entropy of the system has reached __________ value.

Refrigeration capacity of a household refrigerator may be round about __________ tons.

The thermodynamic law, PVy = constant, is not applicable in case of

A system is said to be isopiestic, if there is no __________ change.

Which law of the thermodynamics provides basis for measuring the thermodynamic property?

In the reaction; N2 + O2 2NO, increasing the pressure will result in

Which of the following exemplifies an adiabatic process?

1st law of thermodynamics is nothing but the law of conservation of

Also checkout

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

In the equation, PVⁿ = constant, if the value of n is in between 1 and y (i.e. C_p/C_v), then it represents a reversible __________ process.

The thermodynamic law, PV^y = constant, is not applicable in case of

In the reaction; N₂ + O₂ 2NO, increasing the pressure will result in