When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

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When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

A. More in vapour phase

B. More in liquid phase

C. Same in both the phases

D. Replaced by chemical potential which is more in vapour phase

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Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).

A. Pressure must be kept below 5.2 atm

B. Temperature must be kept above - 57°C

C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C

D. Pressure and temperature must be kept below 5.2 atm. and - 57°C respectively

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__________ decreases during adiabatic throttling of a perfect gas.

A. Entropy

B. Temperature

C. Enthalpy

D. Pressure

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In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

A. C_p < C_v

B. C_p = C_v

C. C_p > C_v

D. C ≥ C_v

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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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For a given substance at a specified temperature, activity is __________ to fugacity.

A. Directly proportional

B. Inversely proportional

C. Equal

D. None of these

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Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.

A. Reaction mechanism

B. Calculation of rates

C. Energy transformation from one form to another

D. None of these

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Compound having large heat of formation is

A. More stable

B. Less stable

C. Not at all stable (like nascent O2)

D. Either more or less stable; depends on the compound

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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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Specific volume of an ideal gas is

A. Equal to its density

B. The reciprocal of its density

C. Proportional to pressure

D. None of these

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Boiling of liquid is accompanied with increase in the

A. Vapor pressure

B. Specific Gibbs free energy

C. Specific entropy

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

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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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There is a change in __________ during the phase transition.

A. Volume

B. Pressure

C. Temperature

D. All a, b & c

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During the phase transition, __________ changes.

A. Pressure

B. Volume

C. Temperature

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

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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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At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

A. Increases

B. Decreases

C. Remains unchanged

D. May increase or decrease; depends on the gas

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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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For the reversible exothermic reaction, N₂ + 3H₂ 2NH₃, increase of pressure would

A. Shift the equilibrium towards right

B. Give higher yield of NH₃

C. Both (B) and (C)

D. Neither (A) nor (B)

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A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by

A. P₁ACBP₂P₁

B. ACBB¹A¹A

C. ACBDA

D. ADBB¹A¹A

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Isobaric process means a constant process.

A. Temperature

B. Pressure

C. Volume

D. Entropy

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Third law of thermodynamics is helpful in

A. Prediction of the extent of a chemical reaction

B. Calculating absolute entropies of substances at different temperature

C. Evaluating entropy changes of chemical reaction

D. Both (B) and (C)

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In a homogeneous solution, the fugacity of a component depends upon the

A. Pressure

B. Composition

C. Temperature

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

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Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

A. dE = Tds - PdV

B. dQ = C_vdT + PdV

C. dQ = C_pdT + Vdp

D. Tds = dE - PdV

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For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

A. x

B. x + 1

C. x + 2

D. x + 3

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At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the

A. Third law of thermodynamics

B. Second law of thermodynamics

C. Nernst heat theorem

D. Maxwell's relations

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For a multi-component system, the term chemical potential is equivalent to the

A. Molal concentration difference

B. Molar free energy

C. Partial molar free energy

D. Molar free energy change

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For an exothermic reaction

A. Only enthalpy change (ΔH) is negative

B. Only internal energy change (ΔE) is negative

C. Both ΔH and ΔE are negative

D. Enthalpy change is zero

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Internal energy is equal to the heat absorbed in case of a/an __________ process.

A. Constant volume

B. Polytropic

C. Adiabatic

D. Constant pressure

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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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The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

A. Internal energy

B. Enthalpy

C. Gibbs free energy

D. Helmholtz free energy

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What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

A. 0

B. 1

C. 2

D. 3

Discuss this answer

Accepted Answer

C. Same in both the phases

When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).

__________ decreases during adiabatic throttling of a perfect gas.

In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

__________ Equation predicts the activity coefficient from experimental data.

For a given substance at a specified temperature, activity is __________ to fugacity.

Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.

Compound having large heat of formation is

The third law of thermodynamics states that the

Specific volume of an ideal gas is

Boiling of liquid is accompanied with increase in the

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

There is a change in __________ during the phase transition.

During the phase transition, __________ changes.

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

At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

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

For the reversible exothermic reaction, N₂ + 3H₂ 2NH₃, increase of pressure would

A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by

Isobaric process means a constant process.

Third law of thermodynamics is helpful in

In a homogeneous solution, the fugacity of a component depends upon the

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the

For a multi-component system, the term chemical potential is equivalent to the

For an exothermic reaction

Internal energy is equal to the heat absorbed in case of a/an __________ process.

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

The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

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When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is - 57°C and 5.2 atm).

__________ decreases during adiabatic throttling of a perfect gas.

In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

__________ Equation predicts the activity coefficient from experimental data.

For a given substance at a specified temperature, activity is __________ to fugacity.

Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.

Compound having large heat of formation is

The third law of thermodynamics states that the

Specific volume of an ideal gas is

Boiling of liquid is accompanied with increase in the

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

There is a change in __________ during the phase transition.

During the phase transition, __________ changes.

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

At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

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

For the reversible exothermic reaction, N2 + 3H2 2NH3, increase of pressure would

A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by

Isobaric process means a constant process.

Third law of thermodynamics is helpful in

In a homogeneous solution, the fugacity of a component depends upon the

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the

For a multi-component system, the term chemical potential is equivalent to the

For an exothermic reaction

Internal energy is equal to the heat absorbed in case of a/an __________ process.

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

The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

Also checkout

Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).

For the reversible exothermic reaction, N₂ + 3H₂ 2NH₃, increase of pressure would

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