Chapter 2 Chemical Reactions and Equations Vocabulary

Front

Minimum amount of energy needed to start a chemical reaction.

Back

Activation energy is the minimum energy required to initiate a chemical reaction.

Front

Catalyst that speeds up chemical reactions in living cells.

Back

An enzyme is a type of protein that acts as a catalyst in biological reactions.

Front

Description of a reaction using element symbols and chemical formulas.

Back

A chemical equation represents a chemical reaction using symbols and formulas.

Front

Chemical reaction that absorbs thermal energy.

Back

An endothermic reaction is one that absorbs heat from its surroundings.

Front

States that the total mass is the same before and after a chemical reaction.

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction.

Front

Chemical reaction that releases thermal energy.

Back

An exothermic reaction is one that releases heat to its surroundings.

Front

Substance that speeds up a chemical reaction without being consumed.

Back

A catalyst is a substance that increases the rate of a chemical reaction without undergoing permanent change.

Front

The process of breaking down a compound into simpler substances.

Back

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

Front

A reaction where one element replaces another in a compound.

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A single replacement reaction involves one element displacing another in a compound.

Front

A reaction where two or more substances combine to form a single product.

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A synthesis reaction occurs when two or more reactants combine to form a single product.