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7. a) Hess's Law. Calculate AHxn° using Hess's Law. Fe₂O3(s) + 2Al(s) 2Al(s) + 3/202(g) 2Fe(s) + 3/2O2(g) - Al₂O3(s) + 2Fe(s) Al₂O3(s) Fe₂O3(s) Hran °= ? KJ Hrxn=-1676 kJ Hrxn=-824 kJ

7. a) Hess's Law. Calculate AHxn° using Hess's Law. Fe₂O3(s) + 2Al(s) 2Al(s) + 3/202(g) 2Fe(s) + 3/2O2(g) - Al₂O3(s) + 2Fe(s) Al₂O3(s) Fe₂O3(s) Hran °= ? KJ Hrxn=-1676 kJ Hrxn=-824 kJ

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.74PAE: 9.74 Without looking up any numerical data or doing calculations, predict whether the following...
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7. a) Hess's Law. Calculate AHxn° using Hess's Law. Fe₂O3(s) + 2Al(s) Al₂O3(s) + 2Fe(s) 2Al(s) + 3/202(g) 2Fe(s) + 3/2O2(g) - b) Exothermic or endothermic? Al₂O3(s) Fe₂O3(s) Hran °= ? KJ Hrxn= -1676 kJ Hrxn=-824 kJ
Transcribed Image Text:7. a) Hess's Law. Calculate AHxn° using Hess's Law. Fe₂O3(s) + 2Al(s) Al₂O3(s) + 2Fe(s) 2Al(s) + 3/202(g) 2Fe(s) + 3/2O2(g) - b) Exothermic or endothermic? Al₂O3(s) Fe₂O3(s) Hran °= ? KJ Hrxn= -1676 kJ Hrxn=-824 kJ
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