Copia - 24-25 MATTER AND ITS PROPERTIES

chemistry

Physical and Chemical properties of matter.

objectives:

a) Identify Physical and Chemical properties of matter. b) Compare and contrast Extensive, Intensive properties of matter.

Factual question:What is matter and how is it classified according to its function?

matter:

Anything that has mass and takes up space!Matter is constantly experiencing both chemical and physical changes

chemistry

Is the study of the composition of matter, properties and the changes that it undergoes.

element

It's a pure substance that cannot be broken down into simpler substances by physical or chemical means.

Compound

A chemical combination of two or more different elements; can be broken down into simpler substances by chemical means and has properties different from those of its component elements.

Example: Water (H2O), NaCl

Substance

Used to refer to either an element or a compound - but not to a mixture because a 'substance' always has a definite composition.

Molecule

Two or more atoms held together, and have a lack of electrical charge.

What are properties?

• Characteristics or behavior of matter.
• Matter has observable and measurable properties.
• We can use them to identify substances.
• Two basic types of properties of matter are Physical properties and Chemical properties:

physical properties:?

Characteristic of matter that can be observed (using your senses) or measured without changing the sample's composition. They are 2 types: Extensive and intensive.

Properties of matter

Physical

Chemical

Extensive

Intensive

extensive

intensive

Properties that do not depend on the amount of substance present.

Properties that depend on the amount of substance present.

extensive properties

They depend on the amount of substance

Weight: Gravitational force exerted on an object.

Mass: Amount matter in an object.

extensive properties

Mass vs weight

extensive properties

They depend on the amount of substance

Volume: Amount of space occupied by an object.

Length:Distance between two points

intensive properties

Properties that do not depend on the amount of substance present. They are used to identify a substance, for example DENSITY and STATES OF MATTER

INTENSIVE properties

density

The measurement of how much mass of a substance is contained in a given volume.

States of matter

intensive properties

Malleability

Luster

Ductility

Is the property of minerals that describes how light is reflected.

Ability to be beaten into thin sheets.

Ability to be drawn into thin wires.

intensive properties

Conductivity

SOLUBILITY

Ability to allow the flow of energy or electricity.

Is the ability or capacity of a solute to be dissolved by a solvent. Although it depends on other factors such as temperature and pressure

intensive properties

Temperature in which a substance changes its state from solid to liquid

Melting POINT: freezing POINT: boiling point:

Temperature in which a substance changes its state from liquid to solid

Temperature in which a substance changes its state from liquid to gas

intensive properties

• Color
• Odor
• Taste
• Magnetism

chemical properties:?

Are characteristics involved when a substance interacts with another substance to change its chemical make-up or identity. Flammability, toxicity, reactivity, acidity, rusting or oxidation.

chemical properties:?

CAN YOU MENTION 3 DIFFERENT PROPERTIES?

WHAT are the differences between extensive and intesive properties?