For a spontaneous process, free energy

Question

For a spontaneous process, free energy

A. Is zero

B. Increases

C. Decreases whereas the entropy increases

D. And entropy both decrease

Share this question with your friends

Show all Chemical Engineering Thermodynamics MCQ

Comment

The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are

A. Zero

B. One

C. Two

D. Three

Discuss this answer

Entropy, which is a measure of the disorder of a system, is:

A. Independent of pressure

B. Independent of temperature

C. Zero at absolute zero temperature for a perfect crystalline substance

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

Discuss this answer

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

A. 0

B. 1

C. 2

D. 3

Discuss this answer

In the reaction; N₂ + O₂ 2NO, increasing the pressure will result in

A. Shifting the equilibrium towards right

B. Shifting the equilibrium towards left

C. No change in equilibrium condition

D. None of these

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

Which of the following has the minimum value of COP for a given refrigeration effect?

A. Reverse Carnot cycle

B. Ordinary vapour-compression cycle

C. Vapour-compression process with a reversible expansion engine

D. Air refrigeration cycle

Discuss this answer

The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.

A. Freezing

B. Triple

C. Boiling

D. Boyle

Discuss this answer

The compressibility factor for an ideal gas is 1. Its value for any other real gas is

A. 1

B. < 1

C. > 1

D. Either (B) or (C), depends on the nature of the gas

Discuss this answer

Compound having large heat of formation is

A. More stable

B. Less stable

C. Not at all stable (like nascent O2)

D. Either more or less stable; depends on the compound

Discuss this answer

Pick out the wrong statement pertaining to the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂.Degree of dissociation of PCl₅ will

A. Decrease on addition of Cl₂

B. Increase on addition of an inert gas at constant pressure

C. Decrease on increasing the pressure of the system

D. None of these

Discuss this answer

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

Discuss this answer

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

A. Solution

B. Vaporisation

C. Formation

D. Sublimation

Discuss this answer

C_v is given by

A. (∂E/∂T)_V

B. (∂E/∂V)_T

C. (∂E/∂P)_V

D. (∂V/∂T)_P

Discuss this answer

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

Discuss this answer

If two gases have same reduced temperature and reduced pressure, then they will have the same

A. Volume

B. Mass

C. Critical temperature

D. None of these

Discuss this answer

Which of the following is not a common refrigerant?

A. Freon-12

B. Ethylene

C. Ammonia

D. Carbon dioxide

Discuss this answer

The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

A. Unity

B. Activity

C. Both (A) & (B)

D. Neither (A) nor (B)

Discuss this answer

Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.

A. Fugacity

B. Partial pressure

C. Activity co-efficient

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

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 variation of heat of reaction with temperature at constant pressure is given by the __________ law.

A. Kelvin's

B. Antoines

C. Kirchoffs

D. None of these

Discuss this answer

Pick out the correct statement.

A. Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero

B. Melting of ice involves increase in enthalpy and a decrease in randomness

C. The internal energy of an ideal gas depends only on its pressure

D. Maximum work is done under reversible conditions

Discuss this answer

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

A. Increased COP

B. Same COP

C. Decreased COP

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

Discuss this answer

The specific heat of saturated water vapour at 100°C is

A. ∞

B. -ve

C. 0

D. +ve

Discuss this answer

For a spontaneous process, free energy

A. Is zero

B. Increases

C. Decreases whereas the entropy increases

D. And entropy both decrease

Discuss this answer

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is

A. Superheated vapour

B. Partially condensed vapour with quality of 0.9

C. Saturated vapour

D. Partially condensed vapour with quality of 0.1

Discuss this answer

Which of the following is affected by the temperature?

A. Fugacity

B. Activity co-efficient

C. Free energy

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

Discuss this answer

Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature __________ as its mole fraction increases.

A. Decreases

B. Decreases exponentially

C. Increases

D. Remain constant

Discuss this answer

__________ explains the equilibrium constant for any chemical reaction.

A. Henry's law

B. Law of mass action

C. Hess's law

D. None of these

Discuss this answer

The principle applied in liquefaction of gases is

A. Adiabatic expansion

B. Joule-Thomson effect

C. Both (A) and (B)

D. Neither (A) nor (B)

Discuss this answer

For the gaseous phase chemical reaction, C₂H₄(g) + H₂O(g) ↔ C₂H₅OH(g), the equilibrium conversion does not depend on the

A. Steam to ethylene ratio

B. Temperature

C. Pressure

D. None of these

Discuss this answer

Accepted Answer

C. Decreases whereas the entropy increases

For a spontaneous process, free energy

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are

Entropy, which is a measure of the disorder of a system, is:

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

In the reaction; N₂ + O₂ 2NO, increasing the pressure will result in

Which of the following decreases with increase in pressure?

Which of the following has the minimum value of COP for a given refrigeration effect?

The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.

The compressibility factor for an ideal gas is 1. Its value for any other real gas is

Compound having large heat of formation is

Pick out the wrong statement pertaining to the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂.Degree of dissociation of PCl₅ will

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

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

C_v is given by

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

If two gases have same reduced temperature and reduced pressure, then they will have the same

Which of the following is not a common refrigerant?

The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.

Second law of thermodynamics is concerned with the

The variation of heat of reaction with temperature at constant pressure is given by the __________ law.

Pick out the correct statement.

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

The specific heat of saturated water vapour at 100°C is

For a spontaneous process, free energy

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is

Which of the following is affected by the temperature?

Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature __________ as its mole fraction increases.

__________ explains the equilibrium constant for any chemical reaction.

The principle applied in liquefaction of gases is

For the gaseous phase chemical reaction, C₂H₄(g) + H₂O(g) ↔ C₂H₅OH(g), the equilibrium conversion does not depend on the

Also checkout

For a spontaneous process, free energy

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are

Entropy, which is a measure of the disorder of a system, is:

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

In the reaction; N2 + O2 2NO, increasing the pressure will result in

Which of the following decreases with increase in pressure?

Which of the following has the minimum value of COP for a given refrigeration effect?

The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.

The compressibility factor for an ideal gas is 1. Its value for any other real gas is

Compound having large heat of formation is

Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2.Degree of dissociation of PCl5 will

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

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

Cv is given by

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

If two gases have same reduced temperature and reduced pressure, then they will have the same

Which of the following is not a common refrigerant?

The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.

Second law of thermodynamics is concerned with the

The variation of heat of reaction with temperature at constant pressure is given by the __________ law.

Pick out the correct statement.

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

The specific heat of saturated water vapour at 100°C is

For a spontaneous process, free energy

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is

Which of the following is affected by the temperature?

Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature __________ as its mole fraction increases.

__________ explains the equilibrium constant for any chemical reaction.

The principle applied in liquefaction of gases is

For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the

Also checkout

In the reaction; N₂ + O₂ 2NO, increasing the pressure will result in

Pick out the wrong statement pertaining to the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂.Degree of dissociation of PCl₅ will

C_v is given by

For the gaseous phase chemical reaction, C₂H₄(g) + H₂O(g) ↔ C₂H₅OH(g), the equilibrium conversion does not depend on the