What are the possible changes during chemical reaction? #Need correct answer.
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Formation of new substances: During a chemical reaction, new substances are formed as a result of the rearrangement of atoms and molecules. Show more…
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What are the changes that may happen to the substances during a chemical change? Explain with an example. Essay type answer, please, in 20 to 30 lines. During a chemical change, substances undergo various changes. These changes can include alterations in physical properties, such as color, odor, and state of matter, as well as changes in chemical composition. One example of a chemical change is the combustion of wood. When wood undergoes combustion, it reacts with oxygen in the air to produce carbon dioxide, water vapor, and heat. The wood, which is primarily composed of cellulose and lignin, breaks down into simpler molecules through a series of chemical reactions. The heat generated during combustion is a result of the exothermic nature of these reactions. In addition to the release of heat, the combustion of wood also leads to the formation of new substances. Carbon dioxide and water vapor are produced as byproducts of the reaction. These substances have different properties compared to the original wood. For example, carbon dioxide is a gas, while wood is a solid. Water vapor is also a gas, whereas wood contains moisture in a liquid or solid state. Furthermore, the color and odor of the wood may change during combustion. The wood may turn black or charred, indicating a chemical change has occurred. The characteristic smell of burning wood is also a result of the chemical reactions taking place. In summary, during a chemical change like the combustion of wood, substances can undergo various transformations. These changes include alterations in physical properties, such as color and odor, as well as changes in chemical composition, leading to the formation of new substances.
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