Using Hess's Law,what Is ΔH°_rxn for the Following Reaction? WO₃(s)

question 45

Multiple Choice

Using Hess's law,what is ΔH°_rxn for the following reaction? WO₃(s) + 3H₂(g) → W(s) + 3H₂O(g)
2W(s) + 3O₂(g) →2WO₃(s) ΔH°_rxn = -1685.8 kJ/mol
2H₂(g) + O₂(g) → 2H₂O(g) ΔH°_rxn = -483.6 kJ/mol

• A)117.5 kJ/mol
• B)235.0 kJ/mol
• C)359.3 kJ/mol
• D)1202.2 kJ/mol
• E)2169.4 kJ/mol

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