(DONE) Chapter 3 & 4 - Lecture 3 Flashcards
(30 cards)
equivalent statement
- relate one unit to another
- 1.000 m = 100.0 cm
conversion factors
- relate one unit to another as a ratio for use in a mathematical operation
What temperature is density usually given at?
25 degrees celcius
matter
- anything that occupies space and has mass
mass (2)
- unaffected by location
- defined as a resistance to acceleration
state of matter: solid (2)
- non compressible
- definite shape and volume
state of matter: liquid (4)
- slightly compressible
- flows
- infinite shape
- definite volume
state of matter: gas (2)
- readily compressible
- takes shape and volume of container
melting
- solid to liquid
solidification/ freezing
- liquid to solid
evaporation
- liquid to gas
condensation
- gas to liquid
sublimation
- solid to gas skipping liquid state
deposition
- gas to solid skipping liquid state
extensive properties of matter (plus example)
- property dependent on the amount of substance
- mass, volume, etc.
intensive properties of matter (plus example)
- Property independent on the amount of substance
- temperature, melting point, density, odor
physical properties (plus example)
- Can be observed without the substance changing into another
- Color, texture, boiling point
physical changes (plus example)
- No change in the chemical composition of matter
- Change in physical state
Chemical properties
- Properties that show when its undergoing a change in composition OR resists a change
- Rusting iron, golds ability to not rust
Chemical change (2 and example)
- change in chemical composition
- always produces at least one new substance
- example: wood burns and produces water
evidence of chemical change (5)
- Gas evolution
- Change in colour
- Change in odour
- Change in temperature
- Formation or disappearance of a solid
pure substance (3)
- sample of matter with both definite and constant composition and distinct chemical properties throughout sample
- Single kind of matter
- Can only be separated by chemical reactions
mixture (4)
- Physical combination of two or more substances
- Varied properties
- Composition may vary from sample to sample
- Mixtures can be separated by physical means
Heterogeneous mixtures (2)
- 2 or more phases (with same or different physical states)
- Each phase has different properties and are visibly different