Chemical Reactions Act 4, 6, 7 Flashcard

Front

What is a chemical reaction?

Back

A chemical reaction is a process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

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What does the law of conservation of mass state?

Back

The law of conservation of mass states that in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction.

Front

What are reactants in a chemical reaction?

Back

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

Front

What are products in a chemical reaction?

Back

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

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What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, reflecting the conservation of mass.

Front

What is an example of a physical change?

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An example of a physical change is melting ice into water, where the substance remains the same (H2O) but changes state.

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What is an example of a chemical change?

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An example of a chemical change is burning wood, which transforms it into ash and gases.

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What is a catalyst?

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A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat.

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What is an endothermic reaction?

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