Most of the coal available in the United States is bituminous or "soft" coal, which contains as much as 5% sulfur by weight. When this coal is burned, the sulfur reacts with oxygen to form sulfur dioxide gas. When the sulfur dioxide gas dissolves in raindrops, it forms sulfuric acid. This is how we get acid rain. Here is the reaction that produces sulfur dioxide gas when soft coal is burned:S8s+8O2g→ 8SO2gSuppose an engineer decides to study the rate of this reaction. He prepares four reaction vessels with 133.1g of solid sulfur and 47.2g of oxygen gas each. The volume and temperature of each vessel is shown in the table below.Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on.vessel volume temperature initial rate of reactionA 5.0L 660.°C B 2.0L 670.°C C 3.0L 670.°C D 3.0L 660.°C
Question
Most of the coal available in the United States is bituminous or "soft" coal, which contains as much as 5% sulfur by weight. When this coal is burned, the sulfur reacts with oxygen to form sulfur dioxide gas. When the sulfur dioxide gas dissolves in raindrops, it forms sulfuric acid. This is how we get acid rain. Here is the reaction that produces sulfur dioxide gas when soft coal is burned:S8s+8O2g→ 8SO2gSuppose an engineer decides to study the rate of this reaction. He prepares four reaction vessels with 133.1g of solid sulfur and 47.2g of oxygen gas each. The volume and temperature of each vessel is shown in the table below.Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on.vessel volume temperature initial rate of reactionA 5.0L 660.°C B 2.0L 670.°C C 3.0L 670.°C D 3.0L 660.°C
Solution
The rate of a chemical reaction is influenced by several factors, including the concentration of the reactants, the temperature at which the reaction is carried out, and the volume of the reaction vessel.
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Temperature: Higher temperatures generally increase the rate of a reaction because heat gives the molecules more kinetic energy, which in turn increases the frequency and energy of collisions between molecules.
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Concentration: The rate of a reaction generally increases with increasing concentration of reactants. This is because a higher concentration means more molecules are available to react, which increases the frequency of collisions.
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Volume: The rate of a reaction can also be affected by the volume of the reaction vessel. A smaller volume can lead to a higher concentration of reactants, which can increase the rate of the reaction.
Given these factors, we can arrange the reaction vessels in decreasing order of initial rate of reaction as follows:
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Vessel B: This vessel has the highest temperature and the smallest volume, which means it has the highest concentration of reactants and the most heat to speed up the reaction.
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Vessel C: This vessel has the same high temperature as vessel B, but a larger volume, which means a lower concentration of reactants.
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Vessel D: This vessel has the same volume as vessel C, but a lower temperature, which means a slower reaction rate.
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Vessel A: This vessel has the largest volume and the lowest temperature, which means it has the lowest concentration of reactants and the slowest reaction rate.
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When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. Which of these is true of this process? A. The identity of each reactant remains the same. B. Sulfur dioxide and sulfur trioxide are the reactants in this change. C. The products have different chemical properties than those of the reactants. D. The products contain more sulfur atoms and fewer oxygen atoms than the reactants.
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Which of the following reaction produces SO2 gas?Burning of sulphur in oxygenReaction of copper with H2SO4Roasting of sulphide oresBurning of H2S
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