Gibbs Energy Change and Equilibrium

IMPORTANT

Gibbs Energy Change and Equilibrium: Overview

In this topic, we will learn to predict the spontaneity of the chemical reaction through Gibbs’ energy. We will also understand to predict the amount of work that could be extracted from it.

Important Questions on Gibbs Energy Change and Equilibrium

HARD
IMPORTANT

What is the significance of point of minima in the plot between Gibbs energy and extent of the reaction?

HARD
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What is the slope of the graph of Gibbs energy plotted against the extent of reaction?

MEDIUM
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What is an endergonic reaction and plot it in a graph between Gibbs free energy and extent of reaction?

MEDIUM
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What is an exergonic reaction and plot it in a graph between Gibbs free energy and extent of reaction?

HARD
IMPORTANT

A plot of Gibbs energy of a reaction mixture against the extent of the reaction is : 

MEDIUM
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Which of the following condition is prefered for an endothermic non-spontaneous process?

HARD
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Predict the signs of G,H and S for an endothermic non-spontaneous process.

HARD
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What are the conditions required for the non-spontaneous endothermic reaction when the change in entropy is positive?

MEDIUM
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What is the effect of temperature on G  of an endothermic process?

MEDIUM
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What are the conditions required for the spontaneity of endothermic reaction when change in entropy is positive?

MEDIUM
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What is the value of S at high temperature for exothermic non-spontaneous process?

MEDIUM
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Which of the following condition is favourable for exothermic non-spontaneous process?

HARD
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For an exothermic non-spontaneous process : 

MEDIUM
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What is the effect of temperature on exothermic non-spontaneous reaction?

HARD
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What is the condition for non-spontaneous exothermic reaction?

HARD
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Predict the spontaneity of the exothermic reactions with positive entropy change.

HARD
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What is the condition for spontaneity of exothermic process when entropy change is negative?

EASY
IMPORTANT

For an exothermic process which is spontaneous : 

MEDIUM
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In which case the reaction is a exothermic spontaneous process?

MEDIUM
IMPORTANT

For the reaction 2O33O2, ΔH, ΔS and G are respectively: