Chemical Reactions Review

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties, such as baking a cake.

Front

What is an example of a chemical reaction?

Back

Paper burning is an example of a chemical reaction.

Front

What does endothermic mean?

Back

Endothermic refers to a reaction that absorbs heat from its surroundings, such as water boiling.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a process that releases heat to its surroundings.

Front

What happens to sugar when heat is applied?

Back

When heat is applied to sugar, it turns brown and changes taste, indicating a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change.

Front

What are products in a chemical reaction?

Back

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

Front

In the reaction A + B -> C, if A has 5 grams and C has 9 grams, how many grams does B have?

Back

B has 4 grams.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.