Chemical Properties

Chemical Properties

·chemical properties describe the ability of substances to react.

·substances can have the ability to react with oxygen, acid, water, etc.

·if a substance can react, it will have one of the following chemical properties:

• liberate heat (get hot)
• absorb heat (get cold)
• rust
• make a sound
• change color
• produce a gas, solid, or liquid.

For example:

·wood can react with fire, so wood has the chemical property to liberate heat.

For example:

·metals can react with oxygen and water, so metals have the chemical property to rust.

Physical vs Chemical Properties

·physical Properties:

• property is observable anyttime

·chemical properties

• property is observable only during a reaction

Consider burning versus melting

·when something burns, it must react with oxygen.

·Physical or Chemical property?

·melting is different because it only needs heat, not oxygen.

·melting is a phase change from solid to liquid.

·Physical or Chemical property?