Classifying Matter
A substance that cannot be broken down (physically OR chemically) into simpler substances is called a(n) ______.
Element
Name a physical property
(answers vary)
Which state of matter has a definite volume but not a definite shape?
Liquid
According to Boyle’s Law, what happens to gas pressure if the volume decreases (at constant temperature)?
Pressure increases
What phase change occurs when a solid turns directly into a gas?
What do you call a substance made of two or more elements that are chemically bonded?
Compound
Name a chemical property
(answers vary)
What happens to particle motion as temperature increases?
Particles move faster
Which gas law shows the direct relationship between volume and temperature?
Charles's Law
What do we call the temperature at which a liquid becomes a gas?
Boiling point
What do we call a combination of two or more substances that are not chemically bonded?
Mixture
Salt is dissolved in water, is this a physical or chemical change?
Physical
Which state of matter consists of charged particles and conducts electricity?
Plasma
A gas has a volume of 2.0 L at a pressure of 150,000 Pa. If the pressure increases to 300,000 Pa, what is the new volume?
1.0 L
During melting, what happens to the temperature of the substance?
In a heterogeneous mixture, the substances are...
Unevenly mixed
This is any solid that forms and separates from a liquid mixture
Precipitate
In which state of matter do particles vibrate in place?
Solid
A balloon has a volume of 1.5 L at 150K.
If the balloon is heated to 200K, what is its new volume?
2.0 L
Is condensation an endothermic or exothermic process?
Exothermic (releases energy)
What type of mixture has particles intermediate in size that don't settle but reflect light?
Colloid
List the 5 common pieces of evidence that a chemical change is occuring.
Change in color
Change in odor
Prod. of a gas
Precipitate
Temp. Change
List all 5 states of matter
Solid, liquid, gas, plasma, Bose-Einstein Condensate
If the volume of a gas doubles while pressure stays constant, what must have happened to the temperature?
Temperature increased
On a heating curve, why does the temperature remain constant during melting and boiling even though energy is still being added?
The energy is used to break intermolecular bonds instead of increasing temperature.