In a reversible process

Question

In a reversible process

A. Tds = dE + dW

B. dE - dW = Tds

C. dW - dE = Tds

D. Tds - dW + dE >0

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Comment

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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The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

A. Gibbs-Duhem

B. Van Laar

C. Gibbs-Helmholtz

D. Margules

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When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

A. Le-Chatelier principle

B. Kopp's rule

C. Law of corresponding state

D. Arrhenius hypothesis

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Joule-Thomson experiment is

A. Isobaric

B. Adiabatic

C. Isenthalpic

D. Both (B) & (C)

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Equilibrium constant decreases as the temperature

A. Increases, for an exothermic reaction

B. Decreases, for an exothermic reaction

C. Increases, for an endothermic reaction

D. None of these

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For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

A. C_v.dT

B. C_p.dT

C. ∫ C_p.dT

D. ∫ C_v.dT

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Forward reaction will be favoured for the exothermic reaction, represented by CO + H₂O CO₂ + H₂, by

A. Low temperature and high pressure

B. Low temperature and low pressure

C. High temperature and high pressure

D. High temperature and low pressure

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Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

A. Straight line

B. Sine curve

C. Parabola

D. Hyperbola

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Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.

A. The same

B. Less than

C. Greater than

D. Different than

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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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Partial molar free energy of an element A in solution is same as its

A. Chemical potential

B. Activity

C. Fugacity

D. Activity co-efficient

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Fugacity and pressure are numerically equal, when the gas is

A. In standard state

B. At high pressure

C. At low temperature

D. In ideal state

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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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__________ 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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C_v is given by

A. (∂E/∂T)_V

B. (∂E/∂V)_T

C. (∂E/∂P)_V

D. (∂V/∂T)_P

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What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?

A. 2

B. 0

C. 3

D. 1

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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 the reaction, C + O₂ → CO₂; ΔH = - 94 kcal. What is the heat content (enthalpy) of O₂?

A. -94 kcal

B. > -94 kcal

C. < - 94 kcal

D. Zero

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Heat is added at constant temperature in an ideal __________ cycle.

A. Stirling

B. Brayton

C. Rankine

D. None of these

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The expression, nRT ln(P₁/P₂), is for the __________of an ideal gas.

A. Compressibility

B. Work done under adiabatic condition

C. Work done under isothermal condition

D. Co-efficient of thermal expansion

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The value of gas constant 'R' is

A. 1.987 cal/gm mole °K

B. 1.987 BTU/lb. mole °R

C. Both (A) and (B)

D. Neither (A) nor (B)

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Gibbs free energy of mixing at constant pressure and temperature is always

A. 0

B. ∞

C. + ve

D. - ve

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Solid and liquid phases of a substance are in equilibrium at the

A. Critical temperature

B. Melting point

C. Freezing point

D. Both (B) and (C)

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Any substance above its critical temperature exists as

A. Saturated vapour

B. Solid

C. Gas

D. Liquid

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For any system, what is the minimum number of degrees of freedom?

A. 0

B. 1

C. 2

D. 3

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Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

A. Polar

B. Non-polar

C. Both (A) & (B)

D. Neither (A) nor (B)

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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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The energy of activation of exothermic reaction is

A. Zero

B. Negative

C. Very large compared to that for endothermic reaction

D. Not possible to predict

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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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Out of the following refrigeration cycles, which one has maximum COP?

A. Air cycle

B. Carnot cycle

C. Ordinary vapor compression cycle

D. Vapor compression with a reversible expansion engine

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Accepted Answer

A. Tds = dE + dW

In a reversible process

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

Joule-Thomson experiment is

Equilibrium constant decreases as the temperature

For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

Forward reaction will be favoured for the exothermic reaction, represented by CO + H₂O CO₂ + H₂, by

Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.

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

Partial molar free energy of an element A in solution is same as its

Fugacity and pressure are numerically equal, when the gas is

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

__________ increases with increase in pressure.

C_v is given by

What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?

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

In the reaction, C + O₂ → CO₂; ΔH = - 94 kcal. What is the heat content (enthalpy) of O₂?

Heat is added at constant temperature in an ideal __________ cycle.

The expression, nRT ln(P₁/P₂), is for the __________of an ideal gas.

The value of gas constant 'R' is

Gibbs free energy of mixing at constant pressure and temperature is always

Solid and liquid phases of a substance are in equilibrium at the

Any substance above its critical temperature exists as

For any system, what is the minimum number of degrees of freedom?

Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

Entropy is a/an

The energy of activation of exothermic reaction is

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

Out of the following refrigeration cycles, which one has maximum COP?

Also checkout

In a reversible process

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

Joule-Thomson experiment is

Equilibrium constant decreases as the temperature

For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O CO2 + H2, by

Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.

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

Partial molar free energy of an element A in solution is same as its

Fugacity and pressure are numerically equal, when the gas is

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

__________ increases with increase in pressure.

Cv is given by

What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?

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

In the reaction, C + O2 → CO2; ΔH = - 94 kcal. What is the heat content (enthalpy) of O2?

Heat is added at constant temperature in an ideal __________ cycle.

The expression, nRT ln(P1/P2), is for the __________of an ideal gas.

The value of gas constant 'R' is

Gibbs free energy of mixing at constant pressure and temperature is always

Solid and liquid phases of a substance are in equilibrium at the

Any substance above its critical temperature exists as

For any system, what is the minimum number of degrees of freedom?

Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

Entropy is a/an

The energy of activation of exothermic reaction is

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

Out of the following refrigeration cycles, which one has maximum COP?

Also checkout

Forward reaction will be favoured for the exothermic reaction, represented by CO + H₂O CO₂ + H₂, by

C_v is given by

In the reaction, C + O₂ → CO₂; ΔH = - 94 kcal. What is the heat content (enthalpy) of O₂?

The expression, nRT ln(P₁/P₂), is for the __________of an ideal gas.