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Calculate the standard enthalpy of reaction for reducing
Chapter 22, Problem 95E(choose chapter or problem)
Calculate the standard enthalpy of reaction for reducing the different forms of iron oxide to iron metal and CO2 from the reaction of the oxide with CO. Identify which reaction is the most exothermic per mole of iron and explain why.
a. Fe3O4
b. FeO
c. Fe2O3
Questions & Answers
QUESTION:
Calculate the standard enthalpy of reaction for reducing the different forms of iron oxide to iron metal and CO2 from the reaction of the oxide with CO. Identify which reaction is the most exothermic per mole of iron and explain why.
a. Fe3O4
b. FeO
c. Fe2O3
ANSWER:Solution:Step 1The chemical reaction for the reduction of iron oxide (Fe O ) to iron3et4 and CO into CO is , 2 (a) Fe3 4) + 4Co (g) 3Fe (s) +4CO (g) 2H reaction npH products npH reactants = [3 H Fe(s) 4 H CO(g) - [3 H Fe(s) 4H CO2(g) = [(3.0 ×0)KJ/mol + 4(-393.5)KJ/mol] -[(1.0 ×(-1117))KJ/mol + 4(-110.5)KJ/mol] = [-1574 KJ/mol] - [-1117 KJ/mol - 442.0 KJ/mol] = [-1574.0 KJ/mol+ 1559.0 KJ/mol] = -15 KJ/molThus enthal