Third law of thermodynamics is concerned with the

Question

Third law of thermodynamics is concerned with the

A. Value of absolute entropy

B. Energy transfer

C. Direction of energy transfer

D. None of these

Share this question with your friends

Show all Chemical Engineering Thermodynamics MCQ

Comment

As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches

A. Zero

B. Unity

C. Infinity

D. None of these

Discuss this answer

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

A. Kinematic viscosity

B. Work

C. Temperature

D. None of these

Discuss this answer

Equation which relates pressure, volume and temperature of a gas is called the

A. Equation of state

B. Gibbs Duhem equation

C. Ideal gas equation

D. None of these

Discuss this answer

A system is said to be isopiestic, if there is no __________ change.

A. Temperature

B. Pressure

C. Volume

D. None of these

Discuss this answer

At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is

A. 1.572

B. 1.9398

C. 3.389

D. 4.238

Discuss this answer

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is

A. 0

B. 1

C. ∞

D. None of these

Discuss this answer

In an ideal refrigeration cycle, the change in internal energy of the fluid is

A. +ve

B. -ve

C. 0

D. Either of the above three; depends on the nature of refrigerant

Discuss this answer

Extensive properties of a thermodynamic system depend upon the __________ of the system.

A. Specific volume

B. Temperature

C. Mass

D. Pressure

Discuss this answer

Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)

A. λb/Tb

B. Tb/λb

C. √(λb/Tb)

D. √(Tb/λb)

Discuss this answer

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

A. d ln p/dt = H_vap/RT²

B. d ln p/dt = RT²/H_vap

C. dp/dt = RT²/H_vap

D. dp/dt = H_vap/RT²

Discuss this answer

COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

A. 0.5

B. 3.5

C. 4.5

D. 8.5

Discuss this answer

The equation, C_p - C_v = R, is true for __________ gas.

A. No

B. Any real

C. Only ideal

D. Both (B) and (C)

Discuss this answer

Which of the following decreases with increase in pressure?

A. Melting point of ice

B. Melting point of wax

C. Boiling point of liquids

D. None of these

Discuss this answer

Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.

A. 270

B. 327

C. 300

D. 540

Discuss this answer

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

A. Entropy

B. Gibbs free energy

C. Internal energy

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

Discuss this answer

__________ decreases during adiabatic throttling of a perfect gas.

A. Entropy

B. Temperature

C. Enthalpy

D. Pressure

Discuss this answer

When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

A. Le-Chatelier principle

B. Kopp's rule

C. Law of corresponding state

D. Arrhenius hypothesis

Discuss this answer

Domestic refrigerator usually works on the __________ refrigeration cycle.

A. Carnot

B. Air

C. Absorption

D. vapour-ejection

Discuss this answer

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

Discuss this answer

High __________ is an undesirable property for a good refrigerant.

A. Specific heat

B. Latent heat of vaporisation

C. Viscosity

D. Specific vapor volume

Discuss this answer

Second law of thermodynamics is concerned with the

A. Amount of energy transferred

B. Direction of energy transfer

C. Irreversible processes only

D. Non-cyclic processes only

Discuss this answer

The work done in isothermal compression compared to that in adiabatic compression will be

A. Less

B. More

C. Same

D. More or less depending upon the extent of work done

Discuss this answer

A refrigeration cycle is the same as a __________ cycle,

A. Turbine

B. Heat engine

C. Reversed heat engine

D. None of these

Discuss this answer

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

Discuss this answer

In an irreversible process

A. Tds = dE - dW = 0

B. dE - dW - Tds = 0

C. Tds - dE + dW < 0

D. Tds - dT + dW < 0

Discuss this answer

Pick out the wrong statement.

A. Activity co-efficient is dimensionless.

B. In case of an ideal gas, the fugacity is equal to its pressure.

C. In a mixture of ideal gases, the fugacity of a component is equal to the partial pressure of the component.

D. The fugacity co-efficient is zero for an ideal gas

Discuss this answer

Which of the following liquid metals has the highest thermal conductivity?

A. Molten sodium

B. Molten lead

C. Mercury

D. Molten potassium

Discuss this answer

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

A. Increases

B. Decreases

C. Remains unchanged

D. Decreases linearly

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

C. Infinity

D. Negative

Discuss this answer

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

Discuss this answer

Accepted Answer

A. Value of absolute entropy

Third law of thermodynamics is concerned with the

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

Equation which relates pressure, volume and temperature of a gas is called the

A system is said to be isopiestic, if there is no __________ change.

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is

In an ideal refrigeration cycle, the change in internal energy of the fluid is

Extensive properties of a thermodynamic system depend upon the __________ of the system.

Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

The equation, C_p - C_v = R, is true for __________ gas.

Which of the following decreases with increase in pressure?

Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.

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

__________ decreases during adiabatic throttling of a perfect gas.

When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

Domestic refrigerator usually works on the __________ refrigeration cycle.

The necessary and sufficient condition for equilibrium between two phases is

High __________ is an undesirable property for a good refrigerant.

Second law of thermodynamics is concerned with the

The work done in isothermal compression compared to that in adiabatic compression will be

A refrigeration cycle is the same as a __________ cycle,

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

In an irreversible process

Pick out the wrong statement.

Which of the following liquid metals has the highest thermal conductivity?

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

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

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

Also checkout

Third law of thermodynamics is concerned with the

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

Equation which relates pressure, volume and temperature of a gas is called the

A system is said to be isopiestic, if there is no __________ change.

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is

In an ideal refrigeration cycle, the change in internal energy of the fluid is

Extensive properties of a thermodynamic system depend upon the __________ of the system.

Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

The equation, Cp - Cv = R, is true for __________ gas.

Which of the following decreases with increase in pressure?

Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.

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

__________ decreases during adiabatic throttling of a perfect gas.

When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

Domestic refrigerator usually works on the __________ refrigeration cycle.

The necessary and sufficient condition for equilibrium between two phases is

High __________ is an undesirable property for a good refrigerant.

Second law of thermodynamics is concerned with the

The work done in isothermal compression compared to that in adiabatic compression will be

A refrigeration cycle is the same as a __________ cycle,

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

In an irreversible process

Pick out the wrong statement.

Which of the following liquid metals has the highest thermal conductivity?

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

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

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

Also checkout

The equation, C_p - C_v = R, is true for __________ gas.