Question: said my answer was wrong Hydrogen fuel cells that power e-cars may one day get their hydrogen gas from the process of electrolysis. How much

said my answer was wrong

Hydrogen fuel cells that power e-cars may one day get their hydrogen gas from the process of electrolysis. How much work is done by the expansion of the gases when 69.8kg of hydrogen gas is formed by electrolysis at 315. K? (Ignore electrical work.) 2H2O(I)O2(g)+2H2(g) Please note: mass of hydrogen was given in kg

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