The minimum number of phases that can exist in a system is

Question

The minimum number of phases that can exist in a system is

A. 0

B. 1

C. 2

D. 3

Correct Answer :

B. 1

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C_p - C_v = R is valid for __________ gases.

A. Ideal

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A domestic refrigerator has a/an __________ cooled condenser.

A. Water

B. Air

D. Gas

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The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmanns constant, T = absolute temperature)

D. 3KT/m

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At absolute zero temperature, the __________ of the gas is zero.

B. Volume

C. Mass

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The Joule-Thomson co-efficient is defined as (∂T/∂P)_H. Its value at the inversion point is

A. ∞

B. 1

C. 0

D. -ve

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Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.

A. 1st

B. Zeroth

C. 3rd

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The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of

A. T

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Clausius-Clapeyron Equation gives accurate result, when the

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In any spontaneous process, the __________ free energy decreases.

B. Gibbs

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Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the

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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

C. ACBDA

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An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to

C. 3 P1V1

D. P1 V1

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

B. Boyle

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Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.

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Gibbs-Helmholtz equation is

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C_v is given by

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The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:

A. 1

B. 2

C. 3

D. 0

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

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The equation, (d log_e PA/d log_e xA) = (d log_e PA/d log_e xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the __________ equation.

Discuss this answer

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

Discuss this answer

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

Discuss this answer

While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is

B. Unity

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For a real gas, the chemical potential is given by

Discuss this answer

For organic compounds, group contribution method can be used for the estimation of

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Which of the following is Virial equation of state?

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

A. Closed

B. Open

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First law of thermodynamics deals with the

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The first law of thermodynamics is a statement of conservation of

A. Heat

C. Energy

D. Work

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Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in

Discuss this answer

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S₁ and Δ S_R are the entropy changes of the system for the irreversible and reversible processes respectively)

Discuss this answer

Answer 1

B. Very high pressure

Answer 2

C. Very low temperature

Answer 3

D. All of the above

Answer 4

C. Evaporative

Answer 5

A. √(2KT/m)

Answer 6

B. √(3KT/m)

Answer 7

C. √(6KT/m)

Answer 8

A. Pressure

Answer 9

D. None of these

Answer 10

D. None of these

Answer 11

B. T and P

Answer 12

C. T, P and Z

Answer 13

D. T and Z

Answer 14

A. Vapour pressure is relatively low and the temperature does not vary over wide limits

Answer 15

B. Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

Answer 16

C. Volume in the liquid state is negligible compared with that in the vapour state

Answer 17

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

Answer 18

A. Helmholtz

Answer 19

C. Both a & b

Answer 20

D. Neither 'a' nor 'b'

Answer 21

A. Calorific value

Answer 22

B. Heat of reaction

Answer 23

C. Heat of combustion

Answer 24

D. Heat of formation

Answer 25

A. P₁ACBP₂P₁

Answer 26

B. ACBB¹A¹A

Answer 27

D. ADBB¹A¹A

Answer 28

A. 12 P1V1

Answer 29

B. 6 P1 V1

Answer 30

A. Critical

Answer 31

C. Inversion

Answer 32

D. Reduced

Answer 33

A. Isothermal

Answer 34

B. Adiabatic

Answer 35

C. Isentropic

Answer 36

D. None of these

Answer 37

A. ΔF = ΔH + T [∂(ΔF)/∂T]P

Answer 38

B. ΔF = ΔH - TΔT

Answer 39

C. d(E - TS) T, V < 0

Answer 40

D. dP/dT = ΔH_vap/T.ΔV_vap

Answer 41

A. (∂E/∂T)_V

Answer 42

B. (∂E/∂V)_T

Answer 43

C. (∂E/∂P)_V

Answer 44

D. (∂V/∂T)_P

Answer 45

A. Reversible isothermal

Answer 46

B. Irreversible isothermal

Answer 47

C. Reversible adiabatic

Answer 48

D. None of these

Answer 49

A. Van Laar

Answer 50

B. Margules

Answer 51

C. Gibbs-Duhem

Answer 52

D. Gibbs-Duhem-Margules

Answer 53

A. Always greater than one

Answer 54

B. Same at the same reduced temperature

Answer 55

C. Same at the same reduced pressure

Answer 56

D. Both (B) & (C)

Answer 57

A. Entropy

Answer 58

B. Gibbs free energy

Answer 59

C. Internal energy

Answer 60

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

Answer 61

A. Infinity

Answer 62

C. Constant

Answer 63

D. Negative

Answer 64

A. RT d ln P

Answer 65

B. RT d ln f

Answer 66

C. R d ln f

Answer 67

D. None of these

Answer 68

A. Critical properties

Answer 69

B. Specific gravity

Answer 70

C. Specific volume

Answer 71

D. Thermal conductivity

Answer 72

A. (p + a/V²)(V - b) = nRT

Answer 73

B. PV = nRT

Answer 74

C. PV = A + B/V + C/V² + D/V³ + ...

Answer 75

D. None of these

Answer 76

C. Isolated

Answer 77

D. Non-thermodynamic

Answer 78

A. Direction of energy transfer

Answer 79

B. Reversible processes only

Answer 80

C. Irreversible processes only

Answer 81

D. None of these

Answer 82

B. Momentum

Answer 83

A. Increased COP

Answer 84

B. Same COP

Answer 85

C. Decreased COP

Answer 86

D. Increased or decreased COP; depending upon the type of refrigerant

Answer 87

A. Δ S₁ is always < Δ S_R

Answer 88

B. Δ S₁ is sometimes > Δ S_R

Answer 89

C. Δ S₁ is always > Δ S_R

Answer 90

D. Δ S₁ is always = Δ S_R

The minimum number of phases that can exist in a system is

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

C_p - C_v = R is valid for __________ gases.

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At absolute zero temperature, the __________ of the gas is zero.

The Joule-Thomson co-efficient is defined as (∂T/∂P)_H. Its value at the inversion point is

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The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of

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The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:

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The minimum number of phases that can exist in a system is

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Cp - Cv = R is valid for __________ gases.

A domestic refrigerator has a/an __________ cooled condenser.

The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmanns constant, T = absolute temperature)

At absolute zero temperature, the __________ of the gas is zero.

The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is

Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.

The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of

Clausius-Clapeyron Equation gives accurate result, when the

In any spontaneous process, the __________ free energy decreases.

Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the

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

An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to

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

Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.

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For a real gas, the chemical potential is given by

For organic compounds, group contribution method can be used for the estimation of

Which of the following is Virial equation of state?

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

First law of thermodynamics deals with the

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Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively)

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C_p - C_v = R is valid for __________ gases.

The Joule-Thomson co-efficient is defined as (∂T/∂P)_H. Its value at the inversion point is

C_v is given by

The equation, (d log_e PA/d log_e xA) = (d log_e PA/d log_e xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the __________ equation.

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