Physical Chemistry
Physical Chemistry
3rd Edition
ISBN: 9780321812001
Author: ENGEL, Thomas/ Reid
Publisher: Pearson College Div
Question
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Chapter 6, Problem 6.5NP

(a)

Interpretation Introduction

Interpretation:

Whether you expect an isolated sample of calcite at T=298 K and P=1 bar to convert to aragonite, given sufficient time should be explained.

Concept Introduction :

For a reaction to be spontaneous, Gibbs free energy change for the reaction should have a negative value.

(b)

Interpretation Introduction

Interpretation:

Can the pressure be increased to the point that isolated calcite will be converted to aragonite should be discussed.

Concept Introduction :

The relation between Gibbs free energy, temperature and pressure is represented as follows:

  ΔG(T,Pf)=ΔG(T,Pi)+ΔV(PfPi)

Here,

  ΔG - Gibbs free energy changeT - temperatureΔV - volume changePf - final pressurePi - initial pressure

(c)

Interpretation Introduction

Interpretation:

The pressure must be achieved to induce the conversion of calcite to aragonite at T=298 K should be calculated.

Concept Introduction :

The relation between Gibbs free energy, temperature and pressure is represented as follows: ΔG(T,Pf)=ΔG(T,Pi)+ΔV(PfPi)

  ΔG - Gibbs free energy changeT - temperatureΔV - volume changePf - final pressurePi - initial pressure

(d)

Interpretation Introduction

Interpretation:

Whether calcite be converted to aragonite at P=1.00 bar , if the temperature is increased should be discussed.

Concept Introduction:

The equilibrium constant depends on temperature.

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Chapter 6 Solutions

Physical Chemistry

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