Phases of Matter
pressure + temp changes
types of substances
Physical properties
chemical properties
100
Which phase has a definite shape and volume?
solid
100
When volume decreases, pressure ___________.
increases
100
A substance that is a good conductor
metal
100
Is density a size-dependent or size-independent property?
size-independent!
100
What is flammability?
the ability of a type of matter to burn easily
200
Which phase(s) are you able to easily compress?
gases
200
The transfer of thermal energy from an area of high temperature to low temperature
heat
200
A compound formed of atoms with opposite charges
ionic compound
200
Which of the following is a qualitative property?
- melting point
- mass
- density
- flammability
flammability
200
True or false: you can observe a chemical property without changing the substance
false!
300
Freezing goes from a _________ to a ____________.
liquid to a solid
300
According the the Volume-Temperature Law, if the pressure is constant, the volume of a gas will increase if the temperature ____________.
increases
300
What has a higher melting point: a nonmetal solid or a metal solid?
metal solid
300
If the mass of something is 100g and the volume is 50mL, what is the density?
INCLUDE UNITS👺👺👺👺👺👺👺👺👺
2g/mL
300
What law states that the total mass before a chemical reaction is the same as the total mass after a chemical reaction
The law of conservation of mass
400
What is kinetic energy and which phase (solid, liquid, gas) has the LEAST amount of kinetic energy?
kinetic energy = energy due to particle motion
solids have the least (particles vibrate in place)
400
If a solid was brought to its melting point, then thermal energy was (added/removed) and the solid will go to a phase change to become (liquid/gas).
added, liquid
400
What type of covalent compound will dissolve in water?
polar covalent compound
400
Explain the difference between mass and weight
mass: amount of matter in a substance
weight: the pull of gravity on matter, location dependent
400
2Mg + O2 --> 2MgO
Name the product(s) in the reaction
2MgO
500
Explain what happens to the kinetic, potential, and thermal energy through condensation?
all 3 decrease
500
Draw a graph of pressure vs. number of particles and state whether the relationship is proportional or inversely proportional.
When you draw the graph, put pressure as the dependent variable.
proportional
500
Of the following, which is not a characteristic of a metal?
- strong attraction between atoms
- malleable
- high kinetic energy
- high melting point
high kinetic energy
- Metals are extremely densely packed due to the attraction between atoms, therefore there isn't a lot of movement possible for the atoms
500
Name a property that you can use to identify matter
melting point, density
500
2Li + F2 --> 2LiF
Explain the difference between the 2 in front of Li and the 2 after the F.
2Li : there are two separate molecules made of a single Lithium atom
F2 : there is a single molecule made of two fluorine atoms