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Determine the Standard Enthalpy of Formation of Fe2O3(s)given the Thermochemical

Question 25

Multiple Choice

Determine the standard enthalpy of formation of Fe2O3(s) given the thermochemical equations below. Fe(s) + 3 H2O( Determine the standard enthalpy of formation of Fe<sub>2</sub>O<sub>3</sub>(s) given the thermochemical equations below. Fe(s) + 3 H<sub>2</sub>O( ) → Fe(OH) <sub>3</sub>(s) + 3/2 H<sub>2</sub>(g) Δ<sub>r</sub>H° = +160.9 kJ/mol-rxn H<sub>2</sub>(g) + 1/2 O<sub>2</sub>(g) → H<sub>2</sub>O( ) Δ<sub>r</sub>H° = -285.8 kJ/mol-rxn Fe<sub>2</sub>O<sub>3</sub>(s) + 3 H<sub>2</sub>O( ) → 2 Fe(OH) <sub>3</sub>(s) Δ<sub>r</sub>H° = +288.6 kJ/mol-rxn A) -252.6 kJ/mol-rxn B) +163.7 kJ/mol-rxn C) -824.2 kJ/mol-rxn D) +33.2 kJ/mol-rxn E) + 890.6 kJ/mol-rxn ) → Fe(OH) 3(s) + 3/2 H2(g)
ΔrH° = +160.9 kJ/mol-rxn
H2(g) + 1/2 O2(g) → H2O( Determine the standard enthalpy of formation of Fe<sub>2</sub>O<sub>3</sub>(s) given the thermochemical equations below. Fe(s) + 3 H<sub>2</sub>O( ) → Fe(OH) <sub>3</sub>(s) + 3/2 H<sub>2</sub>(g) Δ<sub>r</sub>H° = +160.9 kJ/mol-rxn H<sub>2</sub>(g) + 1/2 O<sub>2</sub>(g) → H<sub>2</sub>O( ) Δ<sub>r</sub>H° = -285.8 kJ/mol-rxn Fe<sub>2</sub>O<sub>3</sub>(s) + 3 H<sub>2</sub>O( ) → 2 Fe(OH) <sub>3</sub>(s) Δ<sub>r</sub>H° = +288.6 kJ/mol-rxn A) -252.6 kJ/mol-rxn B) +163.7 kJ/mol-rxn C) -824.2 kJ/mol-rxn D) +33.2 kJ/mol-rxn E) + 890.6 kJ/mol-rxn )
ΔrH° = -285.8 kJ/mol-rxn
Fe2O3(s) + 3 H2O( Determine the standard enthalpy of formation of Fe<sub>2</sub>O<sub>3</sub>(s) given the thermochemical equations below. Fe(s) + 3 H<sub>2</sub>O( ) → Fe(OH) <sub>3</sub>(s) + 3/2 H<sub>2</sub>(g) Δ<sub>r</sub>H° = +160.9 kJ/mol-rxn H<sub>2</sub>(g) + 1/2 O<sub>2</sub>(g) → H<sub>2</sub>O( ) Δ<sub>r</sub>H° = -285.8 kJ/mol-rxn Fe<sub>2</sub>O<sub>3</sub>(s) + 3 H<sub>2</sub>O( ) → 2 Fe(OH) <sub>3</sub>(s) Δ<sub>r</sub>H° = +288.6 kJ/mol-rxn A) -252.6 kJ/mol-rxn B) +163.7 kJ/mol-rxn C) -824.2 kJ/mol-rxn D) +33.2 kJ/mol-rxn E) + 890.6 kJ/mol-rxn ) → 2 Fe(OH) 3(s)
ΔrH° = +288.6 kJ/mol-rxn


A) -252.6 kJ/mol-rxn
B) +163.7 kJ/mol-rxn
C) -824.2 kJ/mol-rxn
D) +33.2 kJ/mol-rxn
E) + 890.6 kJ/mol-rxn

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