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For the reaction: 2H2O(l) + 137 kcal → 2H2 (g) + O2 (g), how many kcal are needed to form 2.00 moles O2(g)?
How many kcal are produced when 32.0 g of CH4 react?
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) + 218 kcal