Consider the following reaction. CH3OH(g)  CO(g) + 2 H2(g)    H = +90.7 kJ (a) Is the reaction exothermic or endothermic? (b) Calculate the amount of heat transferred when 40.0 g of CH3OH(g) are decomposed by this reaction at constant pressure. H =   kJ (c) If the enthalpy change is 20.0 kJ, how many grams of hydrogen gas are produced?   g

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