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Can carbon be used to reduce zinc oxide to zinc at a) 1000 K and b) 1500 K? The reaction we require is: 2C + 2ZNO, = 2Zn + 2CO

Can carbon be used to reduce zinc oxide to zinc at a) 1000 K and b) 1500 K? The reaction we require is: 2C + 2ZNO, = 2Zn + 2CO

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Ellingham Diagram 1. Can carbon be used to reduce zinc oxide to zinc at a) 1000 K and b) 1500 K? The reaction we require is: 2C + 2ZnO, = 2Zn + 2CO 2. What is the best reducing agent at all temperatures up to 2000°C? 3. Write the chemical equations corresponding to the lines ending with Al,0, and ZnO. Show how they can be combined to give a spontaneous reaction between one of these metals and the oxide of the other. 4. Why is gold not found in nature as its oxide? 5. Will Al powder react with Cr,O;? If so at what temperature? Write balance equation.
Transcribed Image Text:Ellingham Diagram 1. Can carbon be used to reduce zinc oxide to zinc at a) 1000 K and b) 1500 K? The reaction we require is: 2C + 2ZnO, = 2Zn + 2CO 2. What is the best reducing agent at all temperatures up to 2000°C? 3. Write the chemical equations corresponding to the lines ending with Al,0, and ZnO. Show how they can be combined to give a spontaneous reaction between one of these metals and the oxide of the other. 4. Why is gold not found in nature as its oxide? 5. Will Al powder react with Cr,O;? If so at what temperature? Write balance equation.
Ellingham Diagrams 0°C 200 400 600 800 1000 1200 1400 1600 2000*C atm. ie00 বি Hi00 10 200 k00 10 2Ni+ Oz2NO zco 300 ర 300 10 C+0g co 400 100 2co 500 WOS 500 10- 2 +0 2M0 600 I05 - 10 Si+ s 700 700 10 of 800 800 900 900 10- 1O Line code Element or lower oalde Oside HH000 10 2800 Condensed Condensed -----m Goseous Condensed Goseous Zro Condensed Goseous Goseous 25r0 10- Suggested ccuracies Changes of O I kilocelorie O 1 3 kilocalories O : IONilecalories O 1>1Olocaleries state Melting pt Boiling p 10 1200 Sublimation pt Logo Tronsition pt. 1200 OK 200 400 600 800 1000 1200 1400 1600 1800 2000 Temperature E 1040 -30 10 1034 1032 1030 8, - 10" Standard free energies of formation of oxides (-AG= -RT Inpo, ): kilojoules/mole 02 国可回日
Transcribed Image Text:Ellingham Diagrams 0°C 200 400 600 800 1000 1200 1400 1600 2000*C atm. ie00 বি Hi00 10 200 k00 10 2Ni+ Oz2NO zco 300 ర 300 10 C+0g co 400 100 2co 500 WOS 500 10- 2 +0 2M0 600 I05 - 10 Si+ s 700 700 10 of 800 800 900 900 10- 1O Line code Element or lower oalde Oside HH000 10 2800 Condensed Condensed -----m Goseous Condensed Goseous Zro Condensed Goseous Goseous 25r0 10- Suggested ccuracies Changes of O I kilocelorie O 1 3 kilocalories O : IONilecalories O 1>1Olocaleries state Melting pt Boiling p 10 1200 Sublimation pt Logo Tronsition pt. 1200 OK 200 400 600 800 1000 1200 1400 1600 1800 2000 Temperature E 1040 -30 10 1034 1032 1030 8, - 10" Standard free energies of formation of oxides (-AG= -RT Inpo, ): kilojoules/mole 02 国可回日
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