Chemical Reactions of Matter

Front

What is a shorthand notation that represents a compound or molecule called?

Back

Chemical Formula

Front

In an exothermic reaction, energy is _________.

Back

Released

Front

What indicates that an exothermic reaction has occurred when two chemicals are mixed?

Back

A temperature increase.

Front

What byproduct shows that a reaction is exothermic?

Back

Heat.

Front

What are the products of the combustion of methane (CH₄)?

Back

CO₂ and H₂O.

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products).

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed.

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.