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Notes On Properties And Formation Of Sulfur Oxides

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LaGuardia Community College - CUNY
SCC201 General Chemistry I

Properties and Formation of Sulfur Oxides

Taylor Radigan
12/07/2014
Instructor: Dr. D. Miller Background Information

“Sulfur is capable of forming two common oxides, SO2 and SO3. One question that we might ask is whether the direct reaction between sulfur and oxygen leads to the formation of SO2, SO3, or a mixture of the two. This question has practical significance because SO3 can go onto react with water to form sulfuric acid, H2SO4, which is produced industrially on a very large scale. Consider also that the answer to this question may depend on the relative amount of each element that is present and the temperature at which the reaction …show more content…

In concentrations above 25% of air by volume, oxygen renders many organic compounds highly flammable. Oxygen is required by most living organisms for cellular respiration as well as for most forms of combustion. It is very commonly used in the steel industry and to create a large number of chemicals. In the form of ozone (O3), it forms a thin layer around the earth, protecting it from the ultraviolet radiation of the sun. (Thomas Jefferson National Accelerator Facility - Office of Science Education, n.d.) When oxygen is reacted with acetylene (C2H2), the reaction produces a tremendously hot flame used for welding. (Royal Society of Chemistry, n.d.)

Sulfur dioxide (SO2) is one of the products of the reaction between sulfur and oxygen. At room temperature, it is a colorless gas that has the odor of burnt matches. Sulfur dioxide mixes with atmospheric water vapor and is a key component of acid rain. (Thompson, 2003) It is the third most common gas produced during volcanic eruptions, behind water vapor (H2O) and carbon dioxide (CO2). (U.S. Geological Survey, 2010) In large volcanic eruptions, sulfur dioxide is converted to sulfuric acid and forms fine sulfate aerosols. These aerosols reflect the sun’s radiation back into space and result in in cooling of the earth’s surface below them. (U.S. Geological Survey,

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