Entropy is a/an

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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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To obtain integrated form of Clausius-Clapeyron equation, ln (P₂/P₁) = (ΔH_V/R) (1/T₁ - 1/T₂) from the exact Clapeyron equation, it is assumed that the

A. Volume of the liquid phase is negligible compared to that of vapour phase

B. Vapour phase behaves as an ideal gas

C. Heat of vaporisation is independent of temperature

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

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The equation, PV = nRT, is best obeyed by gases at

A. Low pressure & high temperature

B. High pressure & low temperature

C. Low pressure & low temperature

D. None of these

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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)

A. Δ S₁ is always < Δ S_R

B. Δ S₁ is sometimes > Δ S_R

C. Δ S₁ is always > Δ S_R

D. Δ S₁ is always = Δ S_R

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The heat capacities for the ideal gas state depend upon the

A. Pressure

B. Temperature

C. Both (A) & (B)

D. Neither (A) nor (B)

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Degree of freedom of the system ice-watervapour will be

A. 0

B. 1

C. 2

D. 3

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High __________ is an undesirable property for a good refrigerant.

A. Specific heat

B. Latent heat of vaporisation

C. Viscosity

D. Specific vapor volume

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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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Internal energy change of a system over one complete cycle in a cyclic process is

A. Zero

B. +ve

C. -ve

D. Dependent on the path

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In the equation PVⁿ = constant, if the value of n = y = C_p/C_v, then it represents a reversible __________ process.

A. Isothermal

B. Adiabatic

C. Isentropic

D. Polytropic

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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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Any substance above its critical temperature exists as

A. Saturated vapour

B. Solid

C. Gas

D. Liquid

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The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is

A. 0

B. +ve

C. -ve

D. ∞

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Water on heating from 1 to 4°C

A. Contracts

B. Expands

C. Has same volume

D. May contract or expand

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Maxwell's relation corresponding to the identity, dH = dS = Vd_p + Σμ_i dn_i is

A. (∂T/∂V)_{S, ni} = -(∂P/∂S)_{V, ni}

B. (∂S/∂P)_{T, ni} = (∂V/∂T)_{P, ni}

C. (∂S/∂V)_{T, ni} = (∂P/∂T)_{V, ni}

D. (∂T/∂P)_{S, ni} = (∂V/∂S)_{P, ni}

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The second law of thermodynamics states that

A. The energy change of a system undergoing any reversible process is zero

B. It is not possible to transfer heat from a lower temperature to a higher temperature

C. The total energy of system and surrounding remains the same

D. None of the above

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

A. ds = 0

B. ds <0

C. ds > 0

D. ds = Constant

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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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For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

A. 6738.9

B. 6753.5

C. 7058.3

D. 9000

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Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.

A. Infinity

B. Minus infinity

C. Zero

D. None of these

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The main feature of Carnot refrigeration cycle is that, it

A. Does not need the addition of external work for its functioning

B. Transfers heat from high temperature to low temperature

C. Accomplishes the reverse effect of the heat engine

D. None of these

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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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Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of

A. Solution

B. Vaporisation

C. Formation

D. Sublimation

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Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

A. Two temperatures only

B. Pressure of working fluid

C. Mass of the working fluid

D. Mass and pressure both of the working fluid

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On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

A. Increase

B. Decrease

C. Remain same

D. Increase in summer and will decrease in winter

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Which of the following has the least thermal efficiency?

A. Steam engine

B. Carnot engine

C. Diesel engine

D. Otto engine

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What is the value of Joule-Thomson co-efficient for an ideal gas?

A. +ve

B. -ve

C. 0

D. ∞

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One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is

A. 30554

B. 10373

C. 4988.4

D. 4364.9

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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.)?

A. T_R/(T₂ - T_R) × (T₁ - T₂)/T₁

B. T_R/(T₂ - T_R) × T₁/(T₁ - T₂)

C. T_R/(T₁ - T_R) × (T₁ - T₂)/T₁

D. None of these

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Which of the following identities can be most easily used to verify steam table data for superheated steam?

A. (∂T/∂V)_S = (∂p/∂S)_V

B. (∂T/∂P)_S = (∂V/∂S)_P

C. (∂P/∂T)_V = (∂S/∂V)_T

D. (∂V/∂T)_P = -(∂S/∂P)_T

Discuss this answer

Air-refrigeration cycle

A. Is the most efficient of all refrigeration cycles

B. Has very low efficiency

C. Requires relatively large quantities of air to achieve a significant amount of refrigeration

D. Both (B) and (C)

Discuss this answer

Accepted Answer

D. None of these

Entropy is a/an

Correct Answer :

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Related Questions

To obtain integrated form of Clausius-Clapeyron equation, ln (P₂/P₁) = (ΔH_V/R) (1/T₁ - 1/T₂) from the exact Clapeyron equation, it is assumed that the

The equation, PV = nRT, is best obeyed by gases at

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)

The heat capacities for the ideal gas state depend upon the

Degree of freedom of the system ice-watervapour will be

High __________ is an undesirable property for a good refrigerant.

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Internal energy change of a system over one complete cycle in a cyclic process is

In the equation PVⁿ = constant, if the value of n = y = C_p/C_v, then it represents a reversible __________ process.

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

Any substance above its critical temperature exists as

The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is

Water on heating from 1 to 4°C

Maxwell's relation corresponding to the identity, dH = dS = Vd_p + Σμ_i dn_i is

The second law of thermodynamics states that

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

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

For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.

The main feature of Carnot refrigeration cycle is that, it

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

Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of

Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

Which of the following has the least thermal efficiency?

What is the value of Joule-Thomson co-efficient for an ideal gas?

One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas 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.)?

Which of the following identities can be most easily used to verify steam table data for superheated steam?

Air-refrigeration cycle

Also checkout

Entropy is a/an

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (ΔHV/R) (1/T1 - 1/T2) from the exact Clapeyron equation, it is assumed that the

The equation, PV = nRT, is best obeyed by gases at

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)

The heat capacities for the ideal gas state depend upon the

Degree of freedom of the system ice-watervapour will be

High __________ is an undesirable property for a good refrigerant.

Boyle's law for gases states that

Internal energy change of a system over one complete cycle in a cyclic process is

In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible __________ process.

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

Any substance above its critical temperature exists as

The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is

Water on heating from 1 to 4°C

Maxwell's relation corresponding to the identity, dH = dS = Vdp + Σμi dni is

The second law of thermodynamics states that

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

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

For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.

The main feature of Carnot refrigeration cycle is that, it

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

Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of

Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

Which of the following has the least thermal efficiency?

What is the value of Joule-Thomson co-efficient for an ideal gas?

One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is

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.)?

Which of the following identities can be most easily used to verify steam table data for superheated steam?

Air-refrigeration cycle

Also checkout

To obtain integrated form of Clausius-Clapeyron equation, ln (P₂/P₁) = (ΔH_V/R) (1/T₁ - 1/T₂) from the exact Clapeyron equation, it is assumed that the

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)

In the equation PVⁿ = constant, if the value of n = y = C_p/C_v, then it represents a reversible __________ process.

Maxwell's relation corresponding to the identity, dH = dS = Vd_p + Σμ_i dn_i 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.)?