Chemical Reactions Act 4, 6, 7 Flashcard

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) undergo a transformation to form new substances (products).

Front

What does the law of conservation of mass state?

Back

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

Front

What are reactants in a chemical equation?

Back

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

Front

What are products in a chemical equation?

Back

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

Front

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, ensuring mass is conserved.

Front

What is an example of a physical change?

Back

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

Front

What is an example of a chemical change?

Back

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

Front

What is a catalyst?

Back

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

Front

What is an exothermic reaction?

Back

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

Front

What is an endothermic reaction?

Back

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