The total change in the enthalpy of a system is independent of the

Question

The total change in the enthalpy of a system is independent of the

A. Number of intermediate chemical reactions involved

B. Pressure and temperature

C. State of combination and aggregation in the beginning and at the end of the reaction

D. None of these

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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

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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 equation DU = Tds - PdV is applicable to infinitesimal changes occuring in

A. An open system of constant composition

B. A closed system of constant composition

C. An open system with changes in composition

D. A closed system with changes in composition

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

A. Specific volume

B. Temperature

C. Mass

D. Pressure

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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

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With increase in temperature, the atomic heat capacities of all solid elements

A. Increases

B. Decreases

C. Remains unchanged

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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The unity of Planck's constant 'h' in the equation, E = hv is

A. J/s

B. J.S

C. J/kmol

D. kmol/J

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What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

A. 0

B. 1

C. 2

D. 3

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An irreversible process

A. Is the analog of linear frictionless motion in machines

B. Is an idealised visualisation of behaviour of a system

C. Yields the maximum amount of work

D. Yields an amount of work less than that of a reversible process

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The enthalpy change when ammonia gas is dissolved in water is called the heat of

A. Solution

B. Formation

C. Dilution

D. Combustion

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Which of the following is an extensive property of a system?

A. Heat capacity

B. Molal heat capacity

C. Pressure

D. Concentration

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If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) C₃H₈(g) will be __________ Kcal.

A. -19.4

B. -30.2

C. 55.2

D. -55.2

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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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For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

A. C_v.dT

B. C_p.dT

C. ∫ C_p.dT

D. ∫ C_v.dT

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__________ law of thermodynamics ascertains the direction of a particular spontaneous process.

A. Zeroth

B. First

C. Second

D. Third

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

A. Enhanced COP

B. Decreased COP

C. No change in the value of COP

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

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Gibbs-Duhem equation

A. States that n₁dμ₁ + n₂dμ₂ + ....n_jdμ_j = 0, for a system of definite composition at constant temperature and pressure

B. Applies only to binary systems

C. Finds no application in gas-liquid equilibria involved in distillation

D. None of these

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Specific volume of an ideal gas is

A. Equal to its density

B. The reciprocal of its density

C. Proportional to pressure

D. None of these

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For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the __________ of each component must be same in all phases.

A. Chemical potential

B. Fugacity

C. Both (A) and (B)

D. Neither (A) nor (B)

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__________ Equation predicts the activity coefficient from experimental data.

A. Lewis-Randall

B. Margules

C. Van Laar

D. Both (B) & (C)

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Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

A. Decreases

B. Increases

C. Remains constant

D. Decreases logarithmically

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The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

A. Contracts

B. Expands

C. Does not change in volume

D. Either (A), (B) or (C)

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Sound waves propagation in air exemplifies an __________ process.

A. Adiabatic

B. Isothermal

C. Isometric

D. None of these

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Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

A. Positive

B. Negative

C. Zero

D. Infinity

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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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Joule-Thomson co-efficient for a perfect gas is

A. Zero

B. Positive

C. Negative

D. None of these

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One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one

A. Hour

B. Day

C. Minute

D. Second

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Domestic refrigerator usually works on the __________ refrigeration cycle.

A. Carnot

B. Air

C. Absorption

D. vapour-ejection

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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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Accepted Answer

A. Number of intermediate chemical reactions involved

The total change in the enthalpy of a system is independent of the

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

Any substance above its critical temperature exists as

The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in

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

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

With increase in temperature, the atomic heat capacities of all solid elements

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

The unity of Planck's constant 'h' in the equation, E = hv is

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

An irreversible process

The enthalpy change when ammonia gas is dissolved in water is called the heat of

Which of the following is an extensive property of a system?

If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) C₃H₈(g) will be __________ Kcal.

Ideal gas law is applicable at

For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

__________ law of thermodynamics ascertains the direction of a particular spontaneous process.

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

Gibbs-Duhem equation

Specific volume of an ideal gas is

For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the __________ of each component must be same in all phases.

__________ Equation predicts the activity coefficient from experimental data.

Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

Sound waves propagation in air exemplifies an __________ process.

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

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

Joule-Thomson co-efficient for a perfect gas is

One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one

Domestic refrigerator usually works on the __________ refrigeration cycle.

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

Also checkout

The total change in the enthalpy of a system is independent of the

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

Any substance above its critical temperature exists as

The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in

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

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

With increase in temperature, the atomic heat capacities of all solid elements

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

The unity of Planck's constant 'h' in the equation, E = hv is

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

An irreversible process

The enthalpy change when ammonia gas is dissolved in water is called the heat of

Which of the following is an extensive property of a system?

If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) C3H8(g) will be __________ Kcal.

Ideal gas law is applicable at

For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

__________ law of thermodynamics ascertains the direction of a particular spontaneous process.

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

Gibbs-Duhem equation

Specific volume of an ideal gas is

For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the __________ of each component must be same in all phases.

__________ Equation predicts the activity coefficient from experimental data.

Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

Sound waves propagation in air exemplifies an __________ process.

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

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

Joule-Thomson co-efficient for a perfect gas is

One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one

Domestic refrigerator usually works on the __________ refrigeration cycle.

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

Also checkout

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

If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) C₃H₈(g) will be __________ Kcal.