phys vs chem prop and changes
is ice melting on a hot pan chemical or physical change
what type of property is color?
Intensive
What are the two types of classifying matter?
pure substances and mixtures
what are the three states of matter?
Solid,Liquid and Gas
what is kinetic molecular theory?
All matter is made of atoms/molecules which are in constant motion due to kinetic energy
what is physical change?
A change that affects the form of a chemical substance but not its composition
What type of property is odor?
Intensive
what type of kinetic energy does a solid have?
a low kinetic energy
What do particles possess?
Kinetic energy
What are three signs of a chemical change?
change in color
production of odor
bubbling
smoking
what is an intensive and extensive property
intensive:properties that do not depend on the amount of matter present
Extensive: properties that do depend on amount of matter present
do mixtures have a definite composition or indefinate?
Both
what shape does a liquid have?
A indefinite shape
What do gas molecules do since they exert force when they collide with something else?
they apply pressure on the surfaces they collide with
is a physical change reversible or irreversible
both
What are intensive and extensive properties based on?
The amount of matter in a substance.
Dry ice is solid carbon dioxide, or CO2. Dry ice may be used as a cooling agent and contains two oxygen atoms bonded to a carbon atom. Dry ice is a ___________________ .
Pure Substance
what state of matter has a indefinite volume?
Gas
what are 5 properties of gas
compressibility, low density, expansion, effusion, fluidity, and diffusion
give 5 examples of physical changes and 5 examples of chemical changes
Physical:Cutting, Smashing, Grinding, melting/freezing, boiling/condensing and crushing
Chemical: Burning/Combusting, Cooking, Rusting, Reacting, Decomposing
Why do two samples of a given substance have the same intensive properties?
The two samples have both the same amount of matter or the same composition.
Methane contains one atom of carbon and four atoms of hydrogen that are chemically bonded. It is a main component of natural gas. Methane is a ___________________ .
Pure substance
Sublimation
What is the property of fluidity?
Gas particles easily flow past each other