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
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