posted by lauren .
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 ƒ¢So for this reaction is __________ J/K.
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.