Hess's Law Reaction Enthalpy (Jee Mains) | ExamDuo
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First Law of Thermodynamics
Medium
Hess's Law Reaction Enthalpy
Given, 2Fe +
3
2
O₂ → Fe₂O₃ , ΔH = -193.4 KJ; Mg +
1
2
O₂ → MgO , ΔH = -140.2 KJ;
What is the ΔH for the following reaction?
3Mg + Fe₂O₃ → 3MgO + 2Fe
SELECT ONE OPTION
A
-227.2 KJ
B
-272.3 KJ
C
227.2 KJ
D
272.3 KJ
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