Question

1. The cartoon below represents the reaction of nitrogen gas (N2) with hydrogen gas (H2) to synthesize ammonia (NHs). Industrially, this che pro mical process is called the Haber-Bosch cess, and is still a very important reaction in the manufacture of fertilizers. The ability to fix every day). It has been estimated that use of nitrogen-based fertilizers has doubled the world's a. The cartoon below shows 6 molecules of hydrogen gas and 2 molecules of nitrogen nitrogen and manufacture fertilizers has revolutionized our (which is sadly not the same thing as saying that many people don't go to bed hungry each and population's ability to feed itself crop yield. gas reacting to make 4 molecules of ammonia. Write a balanced chemical equation for this reaction. Include phase labels. b. Draw an optimal Lewis structure for ammonia (NHs). Indicate the formal charge on each atom in your structure c. The Haber-Bosch Reaction is exothermic (arron--92.0 kJ). How much heat(in kJ) would be released by the synthesis of 40.0 kg of ammonia? d. The "complete" mechanism of the reaction is shown below (actually, I've simplifie just a bit). Hydrazine (N2Ha) consists of two elementary steps. Draw a reaction Is an intermediate in the reaction pathway, and the reaction coordinate diagram that represents the key features of the reaction, including the relative energies of the reactants and products 2 H2 (g) + N2N2H4 (g (Slow) H, (g) + N2H4 (g) 2 NH3 (g) e. Write the instantaneous rate law for this reaction. f. 100.0 g of nitrogen gas was allowed to react with 25.0 g of hydrogen gas in the reaction above. The actual yield of this reaction was 45.0 g of ammonia produced. What is the % yield? g. What effects would the following perturbations have on the position of the overall reaction's equilibrium? Briefly, explain your reasoning. The external pressure is increased The reaction temperature is raised A catalyst is added NHs (g) is removed from the system h. If Kc for the reaction is 0.453 at 600 K, [Hal' = 1.00 M, and [N21-2.00 M what will the molar equilibrium ammonia concentration be? The equilibrium [N2] 0.500 M

Answer 1

1 a)

6H2(g) +2N2(g) → 4NH3(1)

. Banlanced

3H2(g) + N2(g) → 2NH3(1)

b)

Ho 2 に0-2-0 2

2 l7