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The figure below shows Ellingham diagrams for selected metal oxides.

The figure below shows Ellingham diagrams for selected metal oxides.

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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QUESTION 2 The figure below shows Ellingham diagrams for selected metal oxides. -100 de -200 200 + O2= 2CO2 300 2N+O= 2NiO 400 C+ 02 = CO2 --500 20 + Og 2CO Cr + O2 =Cr203 -600- 2Nb + O2= 2NDO -700 SA+ O2 SIO2 -800 -900 2T+ O= 2TO Change of State Element Oxide -1000 Melting Point M Al+ O2=AOs M Boiling Point B B -1100 -1200 200 400 600 800 1000 1200 Temperature ("C) 1400 1600 1800 2000 2200 2400 Fig 1 Using the Ellingham diagrams given in Fig 1, determine by calculation, whether coke (carbon) can be used for the reduction of Cr2O3 at temperatures of 400°C, 800°C, 1200°C and 1600°C by the following reaction: Cr,O; (s) + 3C (s) → 2Cr (s) + 3CO (g) [20] AG" = RT In PO2 (kJimole Oz)
Transcribed Image Text:QUESTION 2 The figure below shows Ellingham diagrams for selected metal oxides. -100 de -200 200 + O2= 2CO2 300 2N+O= 2NiO 400 C+ 02 = CO2 --500 20 + Og 2CO Cr + O2 =Cr203 -600- 2Nb + O2= 2NDO -700 SA+ O2 SIO2 -800 -900 2T+ O= 2TO Change of State Element Oxide -1000 Melting Point M Al+ O2=AOs M Boiling Point B B -1100 -1200 200 400 600 800 1000 1200 Temperature ("C) 1400 1600 1800 2000 2200 2400 Fig 1 Using the Ellingham diagrams given in Fig 1, determine by calculation, whether coke (carbon) can be used for the reduction of Cr2O3 at temperatures of 400°C, 800°C, 1200°C and 1600°C by the following reaction: Cr,O; (s) + 3C (s) → 2Cr (s) + 3CO (g) [20] AG" = RT In PO2 (kJimole Oz)
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