Particle Diagrams of Chemical and Physical Changes

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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a change in the chemical composition.

Front

Does mass change during a physical change?

Back

In a physical change, the mass of the substance remains the same.

Front

Does mass change during a chemical change?

Back

In a chemical change, the mass can change if gases are produced or consumed.

Front

What happens to mass when a gas is produced in an open system?

Back

The mass decreases because the gas escapes into the environment.

Front

What happens to mass when sugar dissolves in water?

Back

The mass stays the same because the total mass of the system (sugar + water) remains constant.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid without changing its chemical structure.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, as it produces new substances (ash, smoke) and changes the chemical composition.

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 is a particle diagram?

Back

A particle diagram is a visual representation that shows the arrangement and movement of particles in a substance during a change.