The Ostwald process for the commercial production of nitric acid involves three steps: 4 NH3(g) + 5 O2(g) ® 4 NO(g) + 6 H2O(g) 2 NO(g) + O2(g) ® 2 NO2(g) 3 NO2(g) + H2O(l) ® 2 HNO3(aq) + NO(g)   A. Calculate the ΔH°, ΔS°, ΔG°, and K (at 298 K) for each of the three steps in the Ostwald process. B. Calculate the temperature at which equilibrium happens for the first step. Is the temperature low or high? Why?  C. Calculate the equilibrium constant for the temperature calculated in b + 50 degrees.

Question

The Ostwald process for the commercial production of nitric acid involves three steps:

4 NH3(g) + 5 O2(g) ® 4 NO(g) + 6 H2O(g)

2 NO(g) + O2(g) ® 2 NO2(g)

3 NO2(g) + H2O(l) ® 2 HNO3(aq) + NO(g)

 

A. Calculate the ΔH°, ΔS°, ΔG°, and K (at 298 K) for each of the three steps in the Ostwald process.

B. Calculate the temperature at which equilibrium happens for the first step. Is the temperature low or high? Why? 

C. Calculate the equilibrium constant for the temperature calculated in b + 50 degrees. 

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