A refrigeration cycle is the same as a __________ cycle,

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A refrigeration cycle is the same as a __________ cycle,

A. Turbine

B. Heat engine

C. Reversed heat engine

D. None of these

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Gibbs free energy at constant pressure and temperature under equilibrium conditions is

A. ∞

B. 0

C. Maximum

D. Minimum

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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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What is the ratio of adiabatic compressibility to isothermal compressibility?

A. 1

B. < 1

C. > 1

D. >> 1

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High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

A. Δ H = 0 and ΔS = 0

B. Δ H ≠ 0 and ΔS = 0

C. Δ H ≠ 0 and ΔS ≠ 0

D. Δ H = 0 and ΔS ≠ 0

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Internal energy of an ideal gas

A. Increases with increase in pressure

B. Decreases with increase in temperature

C. Is independent of temperature

D. None of these

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The necessary and sufficient condition for equilibrium between two phases is

A. The concentration of each component should be same in the two phases

B. The temperature of each phase should be same

C. The pressure should be same in the two phases

D. The chemical potential of each component should be same in the two phases

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Generation of heat by friction is an example of a/an __________ change.

A. Isothermal

B. Irreversible

C. Adiabatic

D. Reversible

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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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A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.

A. Isolated

B. Closed

C. Open

D. None of these

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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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Chemical potential of ith component of a system is given by

A. μ_i = (∂F/∂n_i)_{T, P, ni}

B. μ_i = (∂A/∂n_i)_{T, P, ni}

C. μ_i = (∂F/∂n_i)_{T, P}

D. μ_i = (∂A/∂n_i)_{T, P}

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Number of phases in a colloidal system is:

A. 1

B. 2

C. 3

D. 4

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A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg^-1. K^-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg^-1, K^-1 is

A. -1.87

B. 0

C. 1.26

D. 3.91

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Pick out the correct statement.

A. Compression ratio of an Otto engine is comparatively higher than a diesel engine

B. Efficiency of an Otto engine is higher than that of a diesel engine for the same compression ratio

C. Otto engine efficiency decreases with the rise in compression ratio, due to decrease in work produced per quantity of heat

D. Diesel engine normally operates at lower compression ratio than an Otto engine for an equal output of work

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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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In any spontaneous process, the __________ free energy decreases.

A. Helmholtz

B. Gibbs

C. Both a & b

D. Neither 'a' nor 'b'

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A reasonably general expression for vapourliquid phase equilibrium at low to moderate pressure is φ_i y_i P = Y_i x_if_i° where, Φ is a vapor fugacity component, Y_i is the liquid activity co-efficient and f_i° is the fugacity of the pure component i. the K_i value (Y_i = K_i x_i) is therefore, in general a function of

A. Temperature only

B. Temperature and pressure only

C. Temperature, pressure and liquid composition x_i only

D. Temperature, pressure, liquid composition x_i and vapour composition yi

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Heat of reaction at constant volume is identified with __________ change.

A. Enthalpy

B. Internal energy

C. Either (A) or (B)

D. Neither (A) nor (B)

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At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

A. 72

B. 92

C. 142

D. 192

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The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

A. Less pronounced

B. More pronounced

C. Equal

D. Data insufficient, can't be predicted

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Throttling process is a/an __________ process.

A. Reversible and isothermal

B. Irreversible and constant enthalpy

C. Reversible and constant entropy

D. Reversible and constant enthalpy

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Pick out the correct statement.

A. Entropy and enthalpy are path functions

B. In a closed system, the energy can be exchanged with the surrounding, while matter cannot be exchanged

C. All the natural processes are reversible in nature

D. Work is a state function

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For a constant volume process __________ by the system is used only to increase the internal energy.

A. Heat absorbed

B. Work done

C. Both (A) & (B)

D. Neither (A) nor (B)

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For a reversible process involving only pressure-volume work

A. (dF)_T, p < 0

B. (dF)_T, p > 0

C. (dF)_T, p = 0

D. (dA)_T, v < 0

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The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

A. Reversible isothermal volume change

B. Heating of a substance

C. Cooling of a substance

D. Simultaneous heating and expansion of an ideal gas

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As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches

A. Zero

B. Unity

C. Infinity

D. An indeterminate value

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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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Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

A. Ideal

B. Real

C. Isotonic

D. None of these

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For a spontaneous process, free energy

A. Is zero

B. Increases

C. Decreases whereas the entropy increases

D. And entropy both decrease

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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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Accepted Answer

C. Reversed heat engine

A refrigeration cycle is the same as a __________ cycle,

Correct Answer :

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Related Questions

Gibbs free energy at constant pressure and temperature under equilibrium conditions is

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

What is the ratio of adiabatic compressibility to isothermal compressibility?

High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

Internal energy of an ideal gas

The necessary and sufficient condition for equilibrium between two phases is

Generation of heat by friction is an example of a/an __________ change.

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/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.

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

Chemical potential of ith component of a system is given by

Number of phases in a colloidal system is:

Pick out the correct statement.

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

In any spontaneous process, the __________ free energy decreases.

Heat of reaction at constant volume is identified with __________ change.

At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

Throttling process is a/an __________ process.

Pick out the correct statement.

For a constant volume process __________ by the system is used only to increase the internal energy.

For a reversible process involving only pressure-volume work

The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches

Equilibrium constant decreases as the temperature

Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

For a spontaneous process, free energy

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

Also checkout

A refrigeration cycle is the same as a __________ cycle,

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

Gibbs free energy at constant pressure and temperature under equilibrium conditions is

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

What is the ratio of adiabatic compressibility to isothermal compressibility?

High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

Internal energy of an ideal gas

The necessary and sufficient condition for equilibrium between two phases is

Generation of heat by friction is an example of a/an __________ change.

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)

A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.

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

Chemical potential of ith component of a system is given by

Number of phases in a colloidal system is:

Pick out the correct statement.

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

In any spontaneous process, the __________ free energy decreases.

Heat of reaction at constant volume is identified with __________ change.

At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

Throttling process is a/an __________ process.

Pick out the correct statement.

For a constant volume process __________ by the system is used only to increase the internal energy.

For a reversible process involving only pressure-volume work

The expression for entropy change given by, ΔS = nR ln (V2/V1) + nCv ln (T2/T1) is valid for

As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches

Equilibrium constant decreases as the temperature

Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

For a spontaneous process, free energy

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

Also checkout

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)

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

The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

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