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[Violet89]

Use Hess's Law to calculate the enthalpy change for the reaction

WO3(s) + 3H2(g) => W(s) + 3H2O(g)

from the following equations:

2W(s) + 3O2(g) => 2WO3(s) DH = -1685.4 kJ
2H2(g) + O2(g) => 2H2O(g) DH = -477.84 kJ

[ramboacid]

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