For spontaneous changes in an isolated system (S = entropy)

Question

For spontaneous changes in an isolated system (S = entropy)

A. ds = 0

B. ds <0

C. ds > 0

Correct Answer :

C. ds > 0

Share this question with your friends

Show all Chemical Engineering Thermodynamics MCQ

Comment

Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.

D. Half

Discuss this answer

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

Discuss this answer

At __________ point, all the three phases (i.e. solid, liquid and gas) co-exist.

B. Triple

C. Plait

Discuss this answer

At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

Discuss this answer

Chemical potential of ith component of a system is given by

Discuss this answer

Which of the following is affected by the temperature?

Discuss this answer

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

B. Ax₁

C. Ax₂

Discuss this answer

Pick out the wrong statement.

Discuss this answer

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, T_R (where, T₁ and T₂ are source & surrounding temperatures respectively.)?

Discuss this answer

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.

A. Boyle

Discuss this answer

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

Discuss this answer

__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

Discuss this answer

When dilute aqueous solutions of two salts are mixed, the process is associated with

Discuss this answer

The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture. This is

Discuss this answer

Isobaric process means a constant process.

C. Volume

Discuss this answer

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

Discuss this answer

Gibbs free energy per mole for a pure substance is equal to the

Discuss this answer

For an isothermal reversible compression of an ideal gas

Discuss this answer

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

Discuss this answer

For an incompressible fluid, the __________ is a function of both pressure as well as temperature.

Discuss this answer

Which of the following is not affected by temperature changes?

Discuss this answer

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

Discuss this answer

If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the

Discuss this answer

Pick out the correct statement.

Discuss this answer

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

A. Solids

C. Gases

Discuss this answer

For an isothermal process, the internal energy of a gas

Discuss this answer

For an ideal gas, the activity co-efficient is

Discuss this answer

Entropy of a substance remains constant during a/an __________ change.

Discuss this answer

Specific volume of an ideal gas is

Discuss this answer

With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure

Discuss this answer

Answer 1

D. ds = Constant

Answer 2

A. Less than

Answer 3

B. Same as

Answer 4

C. More than

Answer 5

C. Infinity

Answer 6

D. Negative

Answer 7

A. Eutectic

Answer 8

D. Critical

Answer 9

A. μ° + RT ln f

Answer 10

B. μ°+ R ln f

Answer 11

C. μ° + T ln f

Answer 12

D. μ° + R/T ln f

Answer 13

A. μ_i = (∂F/∂n_i)_{T, P, ni}

Answer 14

B. μ_i = (∂A/∂n_i)_{T, P, ni}

Answer 15

C. μ_i = (∂F/∂n_i)_{T, P}

Answer 16

D. μ_i = (∂A/∂n_i)_{T, P}

Answer 17

A. Fugacity

Answer 18

B. Activity co-efficient

Answer 19

C. Free energy

Answer 20

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

Answer 21

A. A . x₂²

Answer 22

D. Ax₁²

Answer 23

A. The chemical potential of a pure substance depends upon the temperature and pressure

Answer 24

B. The chemical potential of a component in a system is directly proportional to the escaping tendency of that component

Answer 25

C. The chemical potential of ith species (μ_i) in an ideal gas mixture approaches zero as the pressure or mole fraction (x_i) tends to be zero at constant temperature

Answer 26

D. The chemical potential of species 'i' in the mixture (μ_i) is mathematically represented as,μ_i = ∂(nG)/∂ni]_T,P,nj where, n, n_i and n_j respectively denote the total number of moles, moles of i^th species and all mole numbers except ith species. 'G' is Gibbs molar free energy

Answer 27

A. T_R/(T₂ - T_R) × (T₁ - T₂)/T₁

Answer 28

B. T_R/(T₂ - T_R) × T₁/(T₁ - T₂)

Answer 29

C. T_R/(T₁ - T_R) × (T₁ - T₂)/T₁

Answer 30

D. None of these

Answer 31

B. Inversion

Answer 32

C. Critical

Answer 33

D. Reduced

Answer 34

A. Molal concentration difference

Answer 35

B. Molar free energy

Answer 36

C. Partial molar free energy

Answer 37

D. Molar free energy change

Answer 38

A. Entropy

Answer 39

B. Gibbs free energy

Answer 40

C. Internal energy

Answer 41

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

Answer 42

A. Decrease in temperature

Answer 43

B. Increase in temperature

Answer 44

C. No change in temperature

Answer 45

D. Change in temperature which is a function of composition

Answer 46

A. The statement as per Gibbs-Helmholtz

Answer 47

B. Called Lewis-Randall rule

Answer 48

C. Henry's law

Answer 49

D. None of these

Answer 50

A. Temperature

Answer 51

B. Pressure

Answer 52

D. Entropy

Answer 53

A. Third law of thermodynamics

Answer 54

B. Second law of thermodynamics

Answer 55

C. Nernst heat theorem

Answer 56

D. Maxwell's relations

Answer 57

A. Latent heat of vaporisation

Answer 58

B. Chemical potential

Answer 59

C. Molal boiling point

Answer 60

D. Heat capacity

Answer 61

A. Only ΔE = 0

Answer 62

B. Only ΔH =0

Answer 63

C. ΔE = ΔH = 0

Answer 64

D. dQ = dE

Answer 65

A. (T₂ - T₁)/T₂

Answer 66

B. (T₂ - T₁)/T₁

Answer 67

C. (T₁ - T₂)/T₂

Answer 68

D. (T₁ - T₂)/T₁

Answer 69

A. Internal energy

Answer 70

B. Enthalpy

Answer 71

C. Entropy

Answer 72

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

Answer 73

A. Fugacity

Answer 74

B. Activity co-efficient

Answer 75

C. Free energy

Answer 76

D. None of these

Answer 77

A. Reaction mechanism

Answer 78

B. Calculation of rates

Answer 79

C. Energy transformation from one form to another

Answer 80

D. None of these

Answer 81

A. Maxwell's equation

Answer 82

B. Clausius-Clapeyron Equation

Answer 83

C. Van Laar equation

Answer 84

D. Nernst Heat Theorem

Answer 85

A. If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase

Answer 86

B. A process is irreversible as long as Δ S for the system is greater than zero

Answer 87

C. The mechanical work done by a system is always equal to∫P.dV

Answer 88

D. The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants

Answer 89

B. Liquids

Answer 90

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

Answer 91

A. Increases

Answer 92

B. Decreases

Answer 93

C. Remains unchanged

Answer 94

D. Data insufficient, can't be predicted

Answer 95

A. Directly proportional to pressure

Answer 96

B. Inversely proportional to pressure

Answer 97

C. Unity at all pressures

Answer 98

D. None of these

Answer 99

A. Reversible isothermal

Answer 100

B. Irreversible isothermal

Answer 101

C. Reversible adiabatic

Answer 102

D. None of these

Answer 103

A. Equal to its density

Answer 104

B. The reciprocal of its density

Answer 105

C. Proportional to pressure

Answer 106

D. None of these

Answer 107

A. Increases

Answer 108

B. Decreases

Answer 109

C. Remain same

Answer 110

D. Decreases linearly

For spontaneous changes in an isolated system (S = entropy)

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.

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

At __________ point, all the three phases (i.e. solid, liquid and gas) co-exist.

At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

Chemical potential of ith component of a system is given by

Which of the following is affected by the temperature?

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

Pick out the wrong statement.

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, T_R (where, T₁ and T₂ are source & surrounding temperatures respectively.)?

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.

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

__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

When dilute aqueous solutions of two salts are mixed, the process is associated with

The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture. This is

Isobaric process means a constant process.

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

Gibbs free energy per mole for a pure substance is equal to the

For an isothermal reversible compression of an ideal gas

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

For an incompressible fluid, the __________ is a function of both pressure as well as temperature.

Which of the following is not affected by temperature changes?

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

If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the

Pick out the correct statement.

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

For an isothermal process, the internal energy of a gas

For an ideal gas, the activity co-efficient is

Entropy of a substance remains constant during a/an __________ change.

Specific volume of an ideal gas is

With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure

Also checkout

For spontaneous changes in an isolated system (S = entropy)

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.

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

At __________ point, all the three phases (i.e. solid, liquid and gas) co-exist.

At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

Chemical potential of ith component of a system is given by

Which of the following is affected by the temperature?

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

Pick out the wrong statement.

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.)?

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.

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

__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

When dilute aqueous solutions of two salts are mixed, the process is associated with

The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture. This is

Isobaric process means a constant process.

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

Gibbs free energy per mole for a pure substance is equal to the

For an isothermal reversible compression of an ideal gas

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

For an incompressible fluid, the __________ is a function of both pressure as well as temperature.

Which of the following is not affected by temperature changes?

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

If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the

Pick out the correct statement.

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

For an isothermal process, the internal energy of a gas

For an ideal gas, the activity co-efficient is

Entropy of a substance remains constant during a/an __________ change.

Specific volume of an ideal gas is

With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure

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

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, T_R (where, T₁ and T₂ are source & surrounding temperatures respectively.)?

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