Ammonia, air and water is to be converted to a nitric acid solution. Ammonia is available as a liquid at 25°C and its saturation pressure, air and water (as a liquid) are available at 1.013 bar and the same temperature. The nitric acid solution produced is to be 60 wt % HNO₃ also at 25°C and 1.013 bar. The reaction is run over a platinum-rhodium catalyst, is exothermic, and can be used as a source of heat or work.

a. What is the maximum amount of work that can be obtained from the chemical reaction per mole of ammonia consumed? What is the Gibbs free energy change for the process? 

b. In the industrial process for this reaction, 69 kWh of electricity is used per ton of HNO₃ solution produced, and 0.8 tons of saturated steam at 50 psig is obtained starting from cooling water at 25°C. What is the Gibbs free energy change for this process and how much entropy is generated per mole of nitric acid solution produced?