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For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm...

For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction

N2(g) + 3H2(g) <--> 2NH3 (g)

the standard change in Gibbs free energy is ΔG° = -69.0 kJ/mol. What is ΔG for this reaction at 298 K when the partial pressures are

PN2= 0.250 atm, PH2 = 0.450 atm, and PNH3 = 0.800 atm

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