Matter Chemistry Extensive Property Intensive Property Substance Physical Property Vapor Condensation Evaporation Sublimation

CHEMISTRY: branch of physical science that studies the composition, structure, properties and change of matter MATTER: Anything that has mass and volume To identify matter, we must know its properties Two types of properties

EXTENSIVE PROPERTY: Depends upon the amount of matter in a sample Extensive prop. include – Mass – Volume

INTENSIVE PROPERTY: Depends upon the type of matter in a sample – Color, hardness, conductivity, reactivity So which property identifies a sub?

SUBSTANCE: Matter that has a uniform and definite composition – Copper is a substance because every sample has identical intensive prop

Every substance has its own set of PHYSICAL PROPERTIES – A quality or condition of a sub that can be observed or measured – Prop of gold and copper? – Boiling point, melting point, color

Solids have particles packed tightly into an orderly arrangement Liquids have moving particles that attract each other enough to retain the same volume but not shape

Gases have enough energy to keep particles constantly moving but separate from each other – VAPOR: Gaseous state of a sub that is usually a liquid or solid at room temp

Materials can undergo a PHYSICAL CHANGE – Change in which some of the properties change but the composition of the material doesn’t Examples include: – Melting – Boiling – Breaking – Freezing – Crushing – Cutting

Identify the following as an extensive or intensive property – Slippery soap, 4 oz of gold, 2 liters of rubbing alcohol, iron combines with oxygen to form rust, melting point of iron, conductivity of copper If you have 100 g of liquid H 2 O in one container and 300 g of liquid H 2 O in another, what specific properties do they share? What specific properties do they not share? If the 100 g of H 2 O is frozen, do any of those properties change? Which ones change? A substance is defined as something that has uniform and definite composition. Explain what uniform composition and definite composition means. Using APPENDIX B in the back of your book or the internet, select three elements and tell me four INTENSIVE properties of each. Any intensive property will do.

Identify the following as an extensive or intensive property – Slippery soap, 4 oz of gold, 2 liters of rubbing alcohol, iron combines with oxygen to form rust, melting point of iron, conductivity of copper If you have 100 g of liquid H 2 O in one container and 300 g of liquid H 2 O in another, what specific properties do they share? What specific properties do they not share? If the 100 g of H 2 O is frozen, do any of those properties change? Which ones change? A substance is defined as something that has uniform and definite composition. Explain what uniform composition and definite composition means. Using APPENDIX B in the back of your book or the internet, select three elements and tell me four INTENSIVE properties of each. Any intensive property will do.