Consider the following reaction:2 CH3OH1g2¡ 2 CH41g2 + O21g2 ΔH = +252.8 kJ(a) Is this reaction exothermic or endothermic? (b) Calculatethe amount of heat transferred when 24.0 g of CH3OH1g2 isdecomposed by this reaction at constant pressure. (c) For agiven sample of CH3OH, the enthalpy change during thereaction is 82.1 kJ. How many grams of methane gas areproduced? (d) How many kilojoules of heat are releasedwhen 38.5 g of CH41g2 reacts completely with O21g2 to formCH3OH1g2 at constant pressure?

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Consider the following reaction:
2 CH3OH1g2¡ 2 CH41g2 + O21g2 ΔH = +252.8 kJ
(a) Is this reaction exothermic or endothermic? (b) Calculate
the amount of heat transferred when 24.0 g of CH3OH1g2 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? (d) How many kilojoules of heat are released
when 38.5 g of CH41g2 reacts completely with O21g2 to form
CH3OH1g2 at constant pressure?

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