what are the 3 examples of chemical changes?
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['Burning wood.', 'Souring milk.', 'Mixing acid and base.', 'Digesting food.', 'Cooking an egg.', 'Heating sugar to form caramel.', 'Baking a cake.', 'Rusting of iron.']
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Some example of physical change is freezing of water, melting of wax, boiling of water, etc. ... In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s). Physical change is easily reversible i.e original substance can be recovered.
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Melting and burning of candle wax is an example of both physical and chemical changes. Answer: Burning of wood is a example of both physical and chemical change. When wood is burnt the moisture present in it turns to vapour ,it is a physical change while it burns and generate CO2 is a chemical change.
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Combustion reactions, such as a burning candle, are also examples of the chemical change through the combination of wax and oxygen in a reaction that produces heat, light, and carbon dioxide. Decomposition, the opposite of combination, occurs when a single substance breaks down into two or more different substances.
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Growth of a plant, rusting of iron, cooking of food, digestion of food, and burning of candle are chemical changes because here the chemical composition of the substance changes.
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What is an example of a chemical change that happens inside your body? Food being broken down by acids in your stomach. Food being broken down into small pieces by your teeth. Food being moved to your stomach.
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Thus, color and temperature changes are physical changes, while oxidation and hydrolysis are chemical changes. Odor is generated when substances change composition. A very common example is rotting of eggs, that have a very different odor from fresh eggs. ... Hence, odor is a chemical change.
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A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
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Some of the observable examples of chemical reactions in everyday life are respiration (aerobic and anaerobic), photosynthesis, rusting and burning. Some of the observable examples of chemical reactions in everyday life are respiration (aerobic and anaerobic), photosynthesis, rusting and burning.
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The following can indicate that a chemical change has taken place, although this evidence is not conclusive: Change of odor. Change of color (for example, silver to reddish-brown when iron rusts). Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.
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Chemical changes happen when chemical reactions occur. They involve the formation of new chemical elements or compounds . Physical changes do not lead to new chemical substances forming. In a physical change, a substance simply changes physical state , eg from a solid to a liquid.
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Rusting is an example of a chemical change. A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust.
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The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. Another clue that a chemical change has occurred is the formation of a solid. ... As wood burns, it turns into a pile of ashes and gases that rise into air.
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Key Points. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
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At the molecular level, chemical change involves making or breaking of bonds between atoms. These changes are chemical - for example, iron rusts and iron oxide is formed. ... Chemical reaction is a process of changing from one chemical state to another and chemical change is a change in the state of a material.
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['Combination reaction.', 'Decomposition reaction.', 'Displacement reaction.', 'Double Displacement reaction.', 'Precipitation Reaction.']
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Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.