Consider the reaction that converts pyruvic acid (CH3COCOOH) into gaseous acetaldehyde ( CH3CHO ) and gaseous CO2 , which is catalyzed in aqueous solution by the enzyme pyruvate decarboxylase. Assume ideal gas behavior for CO2 . 98 Chapter 3 | The Second Law: The Entropy of the Universe Increases a. Calculate !rG"(298 K) for this reaction. b. Calculate !rG(298 K) for this reaction at 100 bar. State any important assumptions needed in addition to ideal

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

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