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How many grams of methane gas are produced

Consider the following reaction:

2CH₃OH(g) 2CH₄(g) + O₂(g) H = +252.8kJ

(a) Is this reaction exothermic or endothermic?

(b) Calculate the amount of heat transferred when 24.0g of CH₃OH(g) is decomposed by this reaction at constant pressure.

(c) For a given sample of CH₃OH, the enthalpy change during the reaction is 82.1 kJ. How many grams of methane gas are produced?

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Chemistry: How many grams of methane gas are produced

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