a. What is the Gibbs free energy at 298 K for the breakdown of ammonia? 2NH3(g) → N2(9)+ 3H2(g) AH = 91.8 kJ/mol AS = 198.7 J/(mol·K) Is the reaction

spontaneous at 298 K (room temperature)? (2 points) b. What predictions can you make about AH, AS, and AG for the general reaction A(s) + 2B(g) →3C(g) + D(g) + heat? What predictions can you make about the spontaneity of the reaction? Explain your reasoning. (4 points) c. The reaction 2NO2(g) → N2(g) + 202(g) is spontaneous at all temperatures, yet very little of this toxic air pollutant dissociates under normal conditions. How can this be? (2 points)

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