The reaction of ammonia with oxygen (from the air) to form nitrogen monoxide (NO, also known as nitric oxide ) is the first stage in the industrial conversion of ammonia into nitric acid. At the temperatures used, the thermo chemical equation for the reaction is as follows:
4NH3(g) + 502 <--->4NO(g) + 6H2 O(g) (delta)h=-906Kj
a) Explain the following:
i)The effect that increasing the temperature will have on the rate of the reaction.
ii) The effect that increasing the temperature will have on the rate of the reaction
Your answer to (a)(i) should include a clear statement of Le Chatelier's principle and should show clear understanding of how this principle applies to the situation described.
b) In practice the process for producing NO from ammonia is operated at about 650oC in the presence of a platinum catalyst.
Bearing in mind you answers to part (a), explain the role of the platinum catalyst, noting how its presence helps to maximize the equilibrium yield of NO whilst also ensuring a reasonable rate of production.© BrainMass Inc. brainmass.com October 24, 2018, 10:45 pm ad1c9bdddf
(a) The reaction is exothermic. We know because the sign of (delta) H is negative. That means that heat is released in the reaction. Therefore, the heat appears on the right side of the reaction, among the products. LeChatalier's principle states that whenever we perturb a system it will react to ...
An explanation of a reaction of ammonia with oxygen which forms nitrogen monoxide, as well as the effects of temperature changes.
Metabolic pathways, oil, and living things
Write a 3-4 page paper that addresses each of the following topics. Use subtitles and headings to organize your paper. Research your answers to the questions below using scholarly sources, including national, university, and government websites, publications, and scientific journals. Cite your references throughout and include a references section at the end.
1. Begin by describing the origin of crude oil deposits in the ocean. What role did photosynthesis play in this process?
2. The difference between an autotroph and a heterotroph
3. The relationship between a photosynthetic autotroph and a chemotrophic autotroph
4. Why is nitrogen important to living systems?
5. How are these metabolic pathways similar to photosynthesis?
6. From the Urakawa et al. (2012) paper: Why was nitrite production used to measure the activity of the microbes in the study?
7. What is a bioassay? Why did the scientists use it in this study?
8. Which organisms showed sensitivity to oil toxicity? What happened to nitrite production in these organisms? How did nitrite production relate to growth?