For an exothermic reaction

Question

For an exothermic reaction

A. Only enthalpy change (ΔH) is negative

B. Only internal energy change (ΔE) is negative

C. Both ΔH and ΔE are negative

D. Enthalpy change is zero

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There is a change in __________ during the phase transition.

A. Volume

B. Pressure

C. Temperature

D. All a, b & c

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What happens in a reversible adiabatic compression?

A. Heating occurs

B. Cooling occurs

C. Pressure is constant

D. Temperature is constant

Discuss this answer

The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

A. (∂E/∂n_i)_{S, v, nj}

B. (∂G/∂n_i)_{T, P, nj} = (∂A/∂ni) _{T, v, nj}

C. (∂H/∂n_i)_{S, P, nj}

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

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When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

A. More in vapour phase

B. More in liquid phase

C. Same in both the phases

D. Replaced by chemical potential which is more in vapour phase

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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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The unit of equilibrium constant of a chemical reaction is the same as that of

A. Molar concentration

B. Temperature

C. Internal energy

D. None of these

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In case of steady flow compression polytropic process (PVⁿ = constant), the work done on air is the lowest, when

A. n = y = 1.4

B. n = 0

C. n = 1

D. n = 1.66

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In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.

A. Isobaric

B. Isothermal

C. Isentropic

D. Isometric

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Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

A. 580

B. 640

C. 1160

D. Data insufficient; can't be computed

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For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

A. Decreases

B. Increases

C. Remain same

D. Decreases linearly

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Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be

A. Same

B. Doubled

C. Halved

D. One fourth of its original value

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In a working refrigerator, the value of COP is always

A. 0

B. < 0

C. < 1

D. > 1

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Mollier diagram is a plot of

A. Temperature vs. enthalpy

B. Temperature vs. enthalpy

C. Entropy vs. enthalpy

D. Temperature vs. internal energy

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In any spontaneous process,

A. Only F decreases

B. Only A decreases

C. Both F and A decreases

D. Both F and A increase

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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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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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What is the value of ln y (where y = activity co-efficient) for ideal gases?

A. Zero

B. Unity

C. Infinity

D. Negative

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Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

A. dE = Tds - PdV

B. dQ = C_vdT + PdV

C. dQ = C_pdT + Vdp

D. Tds = dE - PdV

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Which of the following is true for Virial equation of state?

A. Virial co-efficients are universal constants

B. Virial co-efficients 'B' represents three body interactions

C. Virial co-efficients are function of temperature only

D. For some gases, Virial equations and ideal gas equations are the same

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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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Charles' law for gases states that

A. V/T = Constant

B. V ∝ 1/T

C. V ∝ 1/P

D. PV/T = Constant

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Which of the following is an undesirable characteristic of a refrigerant?

A. It should be non-explosive

B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils

C. Its vapor pressure at the condenser temperature should be very high

D. None of these

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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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The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

A. Less than

B. Equal to

C. More than

D. Either (B) or (C); depends on the type of alloy

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Which of the following is not correct for a reversible adiabatic process?

A. TV^γ-1 = constant

B. p^1-γ.T^Y = constant

C. PV^γ = constant

D. None of these

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Entropy of the system decreases, when

A. Snow melts into water

B. A gas expands spontaneously from high pressure to low pressure

C. Water is converted into ice

D. Both (B) & (C)

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

A. Molal concentration difference

B. Molar free energy

C. Partial molar free energy

D. Molar free energy change

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Ideal gas law is applicable at

A. Low T, low P

B. High T, high P

C. Low T, high P

D. High T, low P

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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)

Discuss this answer

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

A. Latent heat of vaporisation

B. Chemical potential

C. Molal boiling point

D. Heat capacity

Discuss this answer

Accepted Answer

C. Both ΔH and ΔE are negative

For an exothermic reaction

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

There is a change in __________ during the phase transition.

What happens in a reversible adiabatic compression?

The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

Chemical potential of ith component of a system is given by

The unit of equilibrium constant of a chemical reaction is the same as that of

In case of steady flow compression polytropic process (PVⁿ = constant), the work done on air is the lowest, when

In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.

Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be

In a working refrigerator, the value of COP is always

Mollier diagram is a plot of

In any spontaneous process,

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

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

What is the value of ln y (where y = activity co-efficient) for ideal gases?

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

Which of the following is true for Virial equation of state?

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.

Charles' law for gases states that

Which of the following is an undesirable characteristic of a refrigerant?

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

The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

Which of the following is not correct for a reversible adiabatic process?

Entropy of the system decreases, when

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

Ideal gas law is applicable at

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

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

Also checkout

For an exothermic reaction

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

There is a change in __________ during the phase transition.

What happens in a reversible adiabatic compression?

The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

Chemical potential of ith component of a system is given by

The unit of equilibrium constant of a chemical reaction is the same as that of

In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when

In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.

Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be

In a working refrigerator, the value of COP is always

Mollier diagram is a plot of

In any spontaneous process,

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

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

What is the value of ln y (where y = activity co-efficient) for ideal gases?

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

Which of the following is true for Virial equation of state?

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.

Charles' law for gases states that

Which of the following is an undesirable characteristic of a refrigerant?

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

The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

Which of the following is not correct for a reversible adiabatic process?

Entropy of the system decreases, when

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

Ideal gas law is applicable at

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

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

Also checkout

In case of steady flow compression polytropic process (PVⁿ = constant), the work done on air is the lowest, when

Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

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