Flashcardizz S4 T9 L1 & 2 Chemical Change & Conservation of Mass 24

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that in a closed system, the total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction. This means that matter cannot be created or destroyed.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a new gas is a sign that a chemical reaction has occurred.

Front

What type of change is most often easily reversed?

Back

Physical change is most often easily reversed.

Front

What happens to the chemical properties of a substance during a physical change?

Back

The chemical properties of a substance remain unchanged during a physical change.

Front

What is an example of a closed system?

Back

A pan with a lid on top is an example of a closed system.

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.

Front

What is a physical change?

Back

A physical change is a change in the appearance or state of a substance without altering its chemical composition.

Front

Can both physical and chemical changes occur simultaneously?

Back

Yes, both physical and chemical changes can occur simultaneously in a reaction.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.