Chemistry Practice Problems Thermochemical Equation Practice Problems Solution: Given the thermochemical equation: 4 Fe(s) + 3 O2(...

Solution: Given the thermochemical equation: 4 Fe(s) + 3 O2(g) ⟶ 2 Fe2O3(s)         ΔHrxn = –1652 kJ mol–1 What is the ΔH for the reaction when 500.0 g of Fe2O3 (molar mass = 160. g mol−1 ) is formed.A. –5162.5 kJ B. 2581 kJ C. 5162.5 kJ D. –2581 kJ E. –2065 kJ

Problem

Given the thermochemical equation: 4 Fe(s) + 3 O2(g) ⟶ 2 Fe2O3(s)         ΔHrxn = –1652 kJ mol–1 

What is the ΔH for the reaction when 500.0 g of Fe2O3 (molar mass = 160. g mol−1 ) is formed.

A. –5162.5 kJ 

B. 2581 kJ 

C. 5162.5 kJ 

D. –2581 kJ 

E. –2065 kJ

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