CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

For a multicomponent system, the term chemical potential is equivalent to the

Molal concentration difference

Molar free energy change

Partial molar free energy

Molar free energy

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A gas performs the maximum work, when it expands

Isothermally

Isobarically

Non-uniformly

Adiabatically

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Enthalpy of a gas depends upon its

Temperature

Mass

Volume

Pressure

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For a reversible process involving only pressure-volume work

(dF)T, p = 0

(dF)T, p < 0

(dA)T, v < 0

(dF)T, p > 0

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The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is

-ve

∞

+ve

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Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

Mutual solubility of the two liquids shows a decreasing trend

Two liquids are completely separated into two layers

None of these

A homogeneous solution (say of phenol water) is formed

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Gibbs free energy at constant pressure and temperature under equilibrium conditions is

∞

Minimum

Maximum

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In the ammonia synthesis reaction, N₂ + 3H₂ ⇋ 2NH₃ + 22.4 kcal, the formation of NH₃ will be favoured by

Low pressure

High temperature

Both low temperature and high pressure

Low temperature only

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For organic compounds, group contribution method can be used for the estimation of

Specific gravity

Critical properties

Specific volume

Thermal conductivity

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Charles' law for gases states that

V ∝ 1/P

PV/T = Constant

V ∝ 1/T

V/T = Constant

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