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CO2 has a positive slope on the melting (fusion) curve. Using the questions below as a guide, show that CO2 expands upon melting, without employing the Clausius-Clapeyron equation. (i) Sketch the specific Gibbs free energies of both phases as a function of pressure using the p - T phase diagram. Use derivatives of the specific Gibbs free energies to obtain the sketch. (ii) Sketch the specific volumes of both phases as a function of pressure. (iii) Explain how you obtained the sketch of the specific volumes, hence show that CO2 expands upon melting.

CO2 has a positive slope on the melting (fusion) curve. Using the questions below as a guide, show that CO2 expands upon melting, without employing the Clausius-Clapeyron equation. (i) Sketch the specific Gibbs free energies of both phases as a function of pressure using the p - T phase diagram. Use derivatives of the specific Gibbs free energies to obtain the sketch. (ii) Sketch the specific volumes of both phases as a function of pressure. (iii) Explain how you obtained the sketch of the specific volumes, hence show that CO2 expands upon melting.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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CO2 has a positive slope on the melting (fusion) curve. Using the questions below as a guide, show that CO2 expands upon melting, without employing the Clausius-Clapeyron equation. (i) Sketch the specific Gibbs free energies of both phases as a function of pressure using the p-T phase diagram. Use derivatives of the specific Gibbs free energies to obtain the sketch. (ii) Sketch the specific volumes of both phases as a function of pressure. (iii) Explain how you obtained the sketch of the specific volumes, hence show that CO2 expands upon melting.
Transcribed Image Text:CO2 has a positive slope on the melting (fusion) curve. Using the questions below as a guide, show that CO2 expands upon melting, without employing the Clausius-Clapeyron equation. (i) Sketch the specific Gibbs free energies of both phases as a function of pressure using the p-T phase diagram. Use derivatives of the specific Gibbs free energies to obtain the sketch. (ii) Sketch the specific volumes of both phases as a function of pressure. (iii) Explain how you obtained the sketch of the specific volumes, hence show that CO2 expands upon melting.
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