Question

1.2 physical and chemical properties
define and list examples of:
physical properties

chemical properties

physical change

chemical change

extensive property

intensive property

Explanation:

1. Physical properties: Characteristics of a substance observable/measurable without changing its chemical identity.
2. Chemical properties: Characteristics that describe a substance's ability to change into a new substance via chemical reactions.
3. Physical change: A change to a substance that alters its form/appearance but not its chemical composition.
4. Chemical change: A change where a substance transforms into one or more new substances with distinct chemical compositions.
5. Extensive property: A property that depends on the amount of the substance present.
6. Intensive property: A property that is independent of the amount of the substance present.

Answer:

1. Physical properties

• Definition: Observable without altering chemical identity
• Examples: Color, density, melting point, mass, volume

1. Chemical properties

• Definition: Describes chemical reactivity
• Examples: Flammability, corrosiveness, reactivity with acid, oxidation state

1. Physical change

• Definition: No change to chemical composition
• Examples: Melting ice, boiling water, crushing a can, dissolving sugar in water

1. Chemical change

• Definition: Forms new chemical substances
• Examples: Burning wood, rusting iron, digesting food, baking a cake

1. Extensive property

• Definition: Depends on substance amount
• Examples: Mass, volume, total energy, enthalpy

1. Intensive property

• Definition: Independent of substance amount
• Examples: Temperature, density, boiling point, color, hardness