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Sulfur dioxide is the product of the burning of sulfur or of burning materials that contain sulfur: S8 + 8 O2 → 8 SO2, ΔH = −297 kJ/mol. To aid combustion, liquified sulfur (140–150 °C (284–302 °F) is sprayed through an atomizing nozzle to generate fine drops of sulfur with a large surface area.
There is a 1:1 molar ratio of NH 3 to NO 2 in the above balanced combustion reaction, so 5.871 mol of NO 2 will be formed. We will employ the ideal gas law to solve for the volume at 0 °C (273.15 K) and 1 atmosphere using the gas law constant of R = 0.08206 L·atm·K −1 ·mol −1 :
The resulting gas is bubbled through nitric acid, which will release brown/red vapors of nitrogen dioxide as the reaction proceeds. The completion of the reaction is indicated by the ceasing of the fumes. This method does not produce an inseparable mist, which is quite convenient. 3 SO 2 + 2 HNO 3 + 2 H 2 O → 3 H 2 SO 4 + 2 NO
The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes. Platinum was originally used as the catalyst for this reaction; however, as it is susceptible to reacting with arsenic impurities in the sulfur feedstock, vanadium (V) oxide (V 2 O 5) is now preferred.
Producer gas. Producer gas is fuel gas that is manufactured by blowing through a coke or coal fire with air and steam simultaneously. [1] It mainly consists of carbon monoxide (CO), hydrogen (H 2), as well as substantial amounts of nitrogen (N 2). The caloric value of the producer gas is low (mainly because of its high nitrogen content), and ...
Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO 3. It has been described as "unquestionably the most [economically] important sulfur oxide". [1] It is prepared on an industrial scale as a precursor to sulfuric acid. Sulfur trioxide exists in several forms: gaseous monomer, crystalline trimer ...
The dioxide then disproportionates in water to nitric acid and the nitric oxide feedstock: 3 NO 2 + H 2 O → 2 HNO 3 + NO. The net reaction is maximal oxidation of ammonia: NH 3 + 2 O 2 → HNO 3 + H 2 O. Dissolved nitrogen oxides are either stripped (in the case of white fuming nitric acid) or remain in solution to form red fuming nitric acid.
Sulfur is an essential component of all living cells. It is the eighth most abundant element in the human body by weight, [100] about equal in abundance to potassium, and slightly greater than sodium and chlorine. [101] A 70 kg (150 lb) human body contains about 140 grams (4.9 oz) of sulfur. [102]