Oxygen gas reacts with hydrogen gas according to the following reaction O2(g) + 2H2(g) - 2H20 (1) If the enthalpy of formation for oxygen gas and hydogen gas are both 0 kJ/mol and the enthalpy of formation for water is -286 kJ/mol. What is the enthalpy of the reaction?
ΔΗrxη = ΣηΔΗ(products) - ΣηΔΗ(reactants)

a. 0 kJ

B. not enough information to determine.

C. - 286 kJ

D. -572 kJ

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explanation:  

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