Physical States Flashcards
Kinetic-molecular theory of gases
-A gas consists of particles that move randomly and rapidly
-The size of gas particles is small compared to space between the particles
- gas particles exert no attractive forces on each other
- the kinetic energy of gas particles increases with increasing temp
- when gas particles collide with each other, they rebound and travel in new directions
Matter
Anything that has mass and takes up volume.
Composition
what makes up matter
Solid state
-definite volume
-maintains its shape regardless of the container
-solid particles are close together but can move past one another
Gas state
- no definite shape
- no definite volume
-particles are very far apart and move around randomly
Liquid state
- definite volume
- takes shape of container
- particles close together but move randomly
Physical properties
can be observed or measured without changing the comp. of material
Physical change
alters materials without changing its comp.
Chemical properties
determine how a substance can be converted into another substance
Chemical change
the chemical reaction that converts one substance into another
Pure Substance
- composed of only a single component(atom or molecule)
-has a constant comp, regardless of sample size or origin of sample - It cannot be broken down to other pure substances by a physical change
Mixtures
- composed of more than one component
-they can have varying comps(any combination of solid, liquid, and gas)
-can be separated into their components by a physical process
Is an element a pure substance or a mixture?
pure substance that cannot be broken down by a chemical change
Is a compound a pure substance or mixture?
A pure substance formed by chemically joining two or more elements.
