The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water:
2C2H2 (g) + 5O2 (g) �¨ 4CO2 (g) + 2H2O (l)
The value of ĢSo for this reaction is __________ J/K.
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I can't decipher the f+cents mark but I assume you want to calculate So for the reaction at 25 C. Look in your book at the thermodynamic tables and find So for each material. Then (sum So products)-(sum So reactants) = So reaction.
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