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For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction C2H6(g)+H2(g) <--> 2CH4 the standard change in Gibbs free energy is G° = -32.8 kJ/mol. What is ?G for this reaction at 298 K when the partial pressures are PC2H6=0.150 atm, PH2=0.400 atm, and PCH4=0.700 atm G=

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