Chemistry- Physical and Chemical Properties and Changes

what is a physical property?

a characteristic that can be observed or measured without changing the identity of the substance

what are some physical properties?

color, size, melting/boiling point, odor, solubility, texture, state of matter, ductility, malleability

what is an extensive property?

a property that DOES depend on the amount of matter present in a sample

3 examples of extensive properties:

volume, mass, length

what is an intensive property?

a property that depends on the TYPE of matter in a sample, not the AMOUNT of matter

3 examples of intensive properties:

melting/boiling point, density, conductivity

how are the chemical properties of substances determined?

by testing the substances and seeing if they react or not

what are several chemical properties?

decomposition, flammability, supports combustion, acidity, oxidization, toxicity, lack of reactivity

how does a physical change differ from a chemical change?

physical changes affect the appearance, chemical changes affects a substance's chemical composition and can only be separated with a chemical process.

physical or chemical property/change? ice on a sidewalk melts

physical

physical or chemical /property change? sugar dissolves in water

physical

physical or chemical /property change? hair curls when the humidity increases

physical

physical or chemical /property change? paper is white

physical

physical or chemical /property change? wood burns in air

chemical

physical or chemical /property change? milk turns sour

chemical

physical or chemical /property change? a rock is broken into small pieces

physical

physical or chemical /property change? iron combines with oxygen to form rust

chemical

physical or chemical /property change? platinum does not react with oxygen at room temperature

chemical

physical or chemical /property change? acids produced by bacteria in plaque cause teeth to decay

chemical

physical or chemical /property change? water freezes at 0 degrees celsius

physical

physical or chemical /property change? acetone is highly flammable

chemical

physical or chemical /property change? cyclohexanol boils at 181 degrees celsius

physical

physical or chemical /property change? copper chloride is soluble in ethanol

physical