Use Hess's Law to Calculate the Enthalpy Change for the Reaction

question 46

Multiple Choice

Use Hess's Law to calculate the enthalpy change for the reaction
WO₃(s) + 3H₂(g)  W(s) + 3H₂O(g)
From the following data:
2W(s) + 3O₂(g)  2WO₃(s) H = -1685.4 kJ
2H₂(g) + O₂(g)  2H₂O(g) H = -477.84 kJ

• A) 125.9 kJ
• B) 252.9 kJ
• C) 364.9 kJ
• D) 1207.6 kJ
• E) none of the above

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