Types of Chemical Reactions

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include changes in state (like melting or freezing), shape, or size.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves breaking and forming bonds between atoms. Examples include rusting of iron and burning of wood.

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What is decomposition in chemistry?

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Decomposition is a type of chemical reaction where a single compound breaks down into two or more simpler substances.

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What is a synthesis reaction?

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A synthesis reaction is a type of chemical reaction in which two or more reactants combine to form a single product.

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What is a double replacement reaction?

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A double replacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds.

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What is combustion?

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Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, releasing energy in the form of light and heat.

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What is an example of a physical change?

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An example of a physical change is getting a haircut, where the hair's physical appearance changes but its chemical composition remains the same.

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What happens during a chemical reaction?

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During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.