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Test: Mixtures of Variable Composition: Gibbs-Duhem Equation - Chemistry MCQ


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10 Questions MCQ Test Physical Chemistry - Test: Mixtures of Variable Composition: Gibbs-Duhem Equation

Test: Mixtures of Variable Composition: Gibbs-Duhem Equation for Chemistry 2024 is part of Physical Chemistry preparation. The Test: Mixtures of Variable Composition: Gibbs-Duhem Equation questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Mixtures of Variable Composition: Gibbs-Duhem Equation MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Mixtures of Variable Composition: Gibbs-Duhem Equation below.
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Test: Mixtures of Variable Composition: Gibbs-Duhem Equation - Question 1
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For a system of variable composition, the internal energy depends on

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If some substance is added to the system, then energy of the system increases.

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The molal chemical potential is given by

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The molal chemical potential signifies the change in internal energy per unit mole of a component when S,V and number of moles of all other components are constant.

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Test: Mixtures of Variable Composition: Gibbs-Duhem Equation - Question 3
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An equation in Gibbs energy is be given by

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For this we use G=U+pV-TS and here the summation is taken for all the components present in the system.

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Chemical potential is an extensive property.
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Chemical potential is an intensive property.

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The Gibbs-Duhem equation is given by
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This equation shows the relationship for simultaneous changes in p,T and chemical potential.

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If the composition of system does not change, then dU = TdS - pdV.
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If the composition changes, then the relation includes many other terms.

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The Gibbs entropy equation is given by
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Here summation is taken for all the components present in the system.

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The equation written for Gibbs energy can also be written for
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From the equation dG = Vdp – SdT + Σ[(molal chemical potential)*dn], we can write similar equations for F and H..

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If the phase of a multi-component system is enlarged, which of the following will happen?
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This depends on the type of property.

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For a phase which has only one constituent,
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This means that chemical potential is the molar Gibbs function and is a function of p and T only.

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