Identifying Chemical Reactions

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties.

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What is a physical change?

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A physical change is a process that alters the form or appearance of a substance but does not change its chemical composition.

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What are reactants in a chemical reaction?

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Reactants are the starting substances that undergo a chemical change in a reaction.

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What are products in a chemical reaction?

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Products are the substances that are formed as a result of a chemical reaction.

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How does heating affect the rate of a chemical reaction?

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Heating usually increases the rate of a chemical reaction, causing reactants to collide more frequently and with greater energy.

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What is the difference between a chemical change and a physical change?

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A chemical change results in the formation of new substances, while a physical change does not create new substances.

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What is an example of a chemical change?

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An example of a chemical change is the rusting of iron, where iron reacts with oxygen to form iron oxide.

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What is an example of a physical change?

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An example of a physical change is melting ice, where water changes from solid to liquid but remains H2O.

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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.