Phase changes, changes, graphs Flashcards
What is condensation?
A transition from gas to liquid.
What is sublimation?
A transition from solid to gas
What is melting?
A transition from solid to liquid
What is freezing?
A transition from liquid to solid
What is evaporation?
A transition from liquid to gas.
What is the density of water, and what does it mean?
The density is 1 gram per cm^3, and it tells you anything that sinks in water has a greater density than 1 will sink, and anything less than 1 will float.
What is the boiling point of water?
100 degrees Celsius
What is the freezing point of water?
0 degrees Celsius.
What are some properties of solids?
They have a fixed shape and volume. They do not take the shape of the container that they are placed in.
What are some properties of liquids?
They have a fixed volume but not shape. They take the shape of the container that they are in.
What are some properties of gases?
They do not have a fixed volume or shape. They take the shape of the container they are in.
What is a physical change?
A change in a piece of matter that can be observed or measured without changing the matter’s identity.
What is an example of a physical change?
Breaking a window, coloring a piece of paper, snapping a ruler, changing state.
What is a chemical change?
Describes matter based on it’s ability to change into new matter that has different properties.
What is an example of a chemical change?
Burning wood, rust, digesting food, soured milk, baking bread.
What is the most dense state of matter?
Solid
What is the least dense state of matter?
Gas
The Y axis of a heating/cooling curve graph is always ____
Temperature (in degrees celsius)
The X axis of a heating/cooling curve graph is always ____
Time (in minutes)
On a plateau, the ____ stays the same until the substance has fully changed state.
Temperature
What change is usually reversible?
Physical
What is an example of a liquid?
Water, tea, lemonade, milk.
What is an example of a solid?
Wood, table, Lego, metal.
What is an example of a gas?
Nitrogen, oxygen, carbon.
What is an example of sublimation?
Dry ice
What is an example of melting?
Ice being heated, turning to water
What is an example of freezing?
Water being chilled, turning to ice.
What is an example of condensation?
Water droplets collecting on the outside of a plastic waterbottle
What is an example of evaporation?
Boiling water, it turning into water vapor.
When kinetic energy goes ___ particle to particle attraction goes ___.
Up, down.
What is the difference between chemical and physical changes?
Physical changes do not involve a change in property, or change in compound. Chemical changes do.
What is the opposite of sublimation?
Deposition.
What state of matter has the most kinetic energy and particle motion?
Gas
What state of matter has the least kinetic energy and particle motion?
Solid
On a plateau, the temperature stays the same until the phase change is over. True or false?
True.
