A.
B.
C.
D.
E.
100
What is deposition?
Change from a gas directly to a solid
100
What is the freezing point?
The point where a liquid becomes a solid. Cooling curve.
100
What is a heating curve?
a heating curve is a graph that shows the change in temperature as you add heat (Energy) to a substance
100
What is condensation?
The change from a gas to a liquid
100
What is sublimation?
a change directly from the solid to the gaseous state without becoming liquid
200
What is Melting Point?
The temperature at which a given solid will melt.
200
What happens to the temperature during a phase change?
It stays the same
200
when the temperature is changing is there a phase change? Yes or No?
No
200
What is thermal energy?
the total kinetic and potential energy stored in the particles of an object.
200
What is kinetic theory?
Molecules are in constant motion
300
What is the degree is melting point?
At temperatures above 32°F (0°C)
300
where is there only a liquid?
C-D
300
Between which two points is the gas condensation?
D-E
300
How many "sections" are there on a heating/cooling curve?
5
300
Which phase is the change from a solid to a gas.
A. Condensation
B. Deposition
C. Sublimation
D. evaporation
C.Sublimation
400
What line segment represents only the solid state?
A-B
400
Which process takes the longest to occur (heating solids, melting, freezing, boiling)?
Boiling
400
What happens to the energy of particles in a substance as it changes from gas, to liquid, to solid?
A. KE increases
B. KE decreases
C. KE stays the same
D. KE goes up and then goes down
B. KE decreases
400
Which of the following terms identifies the change from a liquid to gas?
A. Vaporization
B. Condensation
C. Deposition
D. Sublimation
A. Vaporization
400
Does melting and freezing occur at the same temperature?
yes,the melting point and freezing point are the same temperature for any particular substance
500
What's happening from points B-C?
It's melting. It's going from solid-liquid and the bonds (attractive forces) are weakening.
500
Which of these conditions is always true for an exothermic process?
A.They leave the surroundings feeling cold
B.They release energy into the surroundings.
C.They absorb energy from the surroundings
D.The reactants gain energy as they form the products
B. They release energy into the surroundings.
500
Explain why during phase changes the temp. remains constant even though heat is added
The heat energy is stored as potential energy. After the phase change the energy supplied is used to increase temp.
500
What is the second change of phase?
Boiling temperature stays the same during the transition to gas.
500
Thermal energy always moves:
A. From a high temperature object to a lower temperature object.
B. From a lower temperature object to a higher temperature object.
C. From an object with lower kinetic energy to an object with higher kinetic energy.
D. From an object of higher mass to an object of lower mass.
A. From a high temperature object to a lower temperature object.