__________ decreases during adiabatic throttling of a perfect gas.

Question

__________ decreases during adiabatic throttling of a perfect gas.

A. Entropy

B. Temperature

C. Enthalpy

D. Pressure

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In case of the decomposition of hydroiodic acid (2HI H₂ + I₂), addition of H₂ (at equilibrium condition) will

A. Increase the partial pressure of I₂

B. Decrease the partial pressure of HI

C. Diminish the degree of dissociation of HI

D. None of these

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In the reaction, H₂ +I₂ 2HI, addition of an inert gas will

A. Increase the partial pressure of H₂

B. Increase the partial pressure of I₂

C. Increase the total pressure and hence shift the equilibrium towards the right

D. Not affect the equilibrium conditions

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Degree of freedom of the system ice-watervapour will be

A. 0

B. 1

C. 2

D. 3

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A gas performs the maximum work, when it expands

A. Non-uniformly

B. Adiabatically

C. Isobarically

D. Isothermally

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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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The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

A. A . x₂²

B. Ax₁

C. Ax₂

D. Ax₁²

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Entropy of an ideal gas depends upon its

A. Pressure

B. Temperature

C. Both (A) & (B)

D. Neither (A) nor (B)

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The main feature of Carnot refrigeration cycle is that, it

A. Does not need the addition of external work for its functioning

B. Transfers heat from high temperature to low temperature

C. Accomplishes the reverse effect of the heat engine

D. None of these

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Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

A. 0

B. ∞

C. +ve

D. -ve

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1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

A. 35 K

B. 174 K

C. 274 K

D. 154 K

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Work done is a

A. Property of the system

B. Path function

C. Point function

D. State description of a system

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In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is

A. More

B. Less

C. Same

D. Unpredictable; depends on the particular reaction

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Fugacity is a measure of the

A. Escaping tendencies of the same substance in different phases of a system

B. Relative volatility of a mixture of two miscible liquids

C. Behaviour of ideal gases

D. None of these

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C_v for an ideal gas

A. Does not depend upon temperature

B. Is independent of pressure only

C. Is independent of volume only

D. Is independent of both pressure and volume

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Solid and liquid phases of a substance are in equilibrium at the

A. Critical temperature

B. Melting point

C. Freezing point

D. Both (B) and (C)

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4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is

A. 4 J

B. ∞

C. 0

D. 8 J

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In a reversible process

A. Tds = dE + dW

B. dE - dW = Tds

C. dW - dE = Tds

D. Tds - dW + dE >0

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Gibbs phase rule finds application, when heat transfer occurs by

A. Conduction

B. Convection

C. Radiation

D. Condensation

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The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmanns constant, T = absolute temperature)

A. √(2KT/m)

B. √(3KT/m)

C. √(6KT/m)

D. 3KT/m

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The acentric factor of a materical, 'ω', is defined as ω = -log₁₀(P_r^sat)T_r^-1 = 0.7, where, P_r^sat = reduced vapor pressure, T_r = reduced temperature. The value of acentric factor is always

A. > 2

B. < 1

C. > 1

D. < 3

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Heat of formation of an element in its standard state is

A. 0

B. < 0

C. > 0

D. A function of pressure

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The kinetic energy of gas molecule is zero at

A. 0°C

B. 273°C

C. 100°C

D. -273°C

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In a turbine, the fluid expands almost

A. Isothermally

B. Isobarically

C. Adiabatically

D. None of these

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In an ideal gas mixture, fugacity of a species is equal to its

A. Vapor pressure

B. Partial pressure

C. Chemical potential

D. None of these

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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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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 value of C_p & C_v respectively for monatomic gases in Kcal/kg Mole.°K are

A. 5 & 3

B. 3.987 & 1.987

C. 1.987 & 0.66

D. 0.66 & 1.987

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Which of the following represents the Virial equation of state?

A. T = [RT/(V- b)] - [a/√T. V(V + b)]

B. PV/RT = 1 + (B/V) + (C/V²) + ……

C. n₁u₂ + μ₂μ₁ = 0

D. None of these

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Joule-Thomson effect i.e., a throttling process is a constant __________ process.

A. Entropy

B. Temperature

C. Internal energy

D. Enthalpy

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Pick out the correct equation relating 'F' and 'A'.

A. F = A + PV

B. F = E + A

C. F = A - TS

D. F = A + TS

Discuss this answer

Accepted Answer

D. Pressure

__________ decreases during adiabatic throttling of a perfect gas.

Correct Answer :

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Related Questions

In case of the decomposition of hydroiodic acid (2HI H₂ + I₂), addition of H₂ (at equilibrium condition) will

In the reaction, H₂ +I₂ 2HI, addition of an inert gas will

Degree of freedom of the system ice-watervapour will be

A gas performs the maximum work, when it expands

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

The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

Entropy of an ideal gas depends upon its

The main feature of Carnot refrigeration cycle is that, it

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

Work done is a

In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is

Fugacity is a measure of the

C_v for an ideal gas

Solid and liquid phases of a substance are in equilibrium at the

4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is

In a reversible process

Gibbs phase rule finds application, when heat transfer occurs by

The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmanns constant, T = absolute temperature)

The acentric factor of a materical, 'ω', is defined as ω = -log₁₀(P_r^sat)T_r^-1 = 0.7, where, P_r^sat = reduced vapor pressure, T_r = reduced temperature. The value of acentric factor is always

Heat of formation of an element in its standard state is

The kinetic energy of gas molecule is zero at

In a turbine, the fluid expands almost

In an ideal gas mixture, fugacity of a species is equal to its

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)

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

The value of C_p & C_v respectively for monatomic gases in Kcal/kg Mole.°K are

Which of the following represents the Virial equation of state?

Joule-Thomson effect i.e., a throttling process is a constant __________ process.

Pick out the correct equation relating 'F' and 'A'.

Also checkout

__________ decreases during adiabatic throttling of a perfect gas.

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

In case of the decomposition of hydroiodic acid (2HI H2 + I2), addition of H2 (at equilibrium condition) will

In the reaction, H2 +I2 2HI, addition of an inert gas will

Degree of freedom of the system ice-watervapour will be

A gas performs the maximum work, when it expands

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

The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is

Entropy of an ideal gas depends upon its

The main feature of Carnot refrigeration cycle is that, it

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

Work done is a

In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is

Fugacity is a measure of the

Cv for an ideal gas

Solid and liquid phases of a substance are in equilibrium at the

4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is

In a reversible process

Gibbs phase rule finds application, when heat transfer occurs by

The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmanns constant, T = absolute temperature)

The acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always

Heat of formation of an element in its standard state is

The kinetic energy of gas molecule is zero at

In a turbine, the fluid expands almost

In an ideal gas mixture, fugacity of a species is equal to its

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)

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

The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are

Which of the following represents the Virial equation of state?

Joule-Thomson effect i.e., a throttling process is a constant __________ process.

Pick out the correct equation relating 'F' and 'A'.

Also checkout

In case of the decomposition of hydroiodic acid (2HI H₂ + I₂), addition of H₂ (at equilibrium condition) will

In the reaction, H₂ +I₂ 2HI, addition of an inert gas will

The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

C_v for an ideal gas

The acentric factor of a materical, 'ω', is defined as ω = -log₁₀(P_r^sat)T_r^-1 = 0.7, where, P_r^sat = reduced vapor pressure, T_r = reduced temperature. The value of acentric factor is always

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)

The value of C_p & C_v respectively for monatomic gases in Kcal/kg Mole.°K are