Terms
Phase Changes
Energy
Heat
Temperature
100
Releases energy
Exothermic
100
True or False:
During a phase change, the kinetic energy changes.
False, potential energy changes
100
When a buzzer is ringing, is it in a high energy or low energy state?
high energy
100
Fill in the blank: Heat transfers from ____________ to ____________.
hot, cold
100
Convert 56 degrees Celsius to Fahrenheit
132.8 degrees fahrenheit
200
Absorbs Energy
Endothermic
200
What phase change is a gas to a solid?
deposition
200
How could you get the lights in our classroom to return to a low energy state?
Turn them off.
200
List the following substances in order from lowest specific heat capacity to highest: water, sand, towel
1. Sand
2. Towel
3. Water
200
As temperature increases, what happens to the particles in the substance?
They move faster.
300
When two or more phases are present at the same time
Equilibrium
300
At what time (in minutes) does the liquid first appear?
2 minutes
300
What is increasing between 6.5 minutes and 20 minutes?
Potential Energy
300
Which substance is easier to heat?
Porcelain
300
Definition of Temperature
Measurement of average kinetic energy of particles
400
Definition of Triple point
When all three phases (solid, liquid, gas) are in equilibrium
400
If the substance starts at 45 atm and 700°C, then heat is continually removed to decrease the temperature, it will __________ from a _____ to a _______, then __________ from a _______ to a _____.
condense, gas, liquid, freeze, liquid, solid
400
In this heating curve, when is kinetic energy decreasing?
Never
400
According to this graph, from 0 to 22 minutes, what is constantly increasing?
Heat
400
As a space heater is ran, what happens to the particles in the air around it?
they vibrate faster/kinetic energy increases
500
"How much heat is needed to change a substance's temperature by one degree" is called
Specific Heat Capacity
500
What temperature AND pressure is this compound in equilibrium between a solid and a liquid?
Answers may vary.
500
List, in order, 3 main types of energy used in a battery powered flashlight
chemical, electric, light
500
If the same size samples of these substances were left out in the sun for the same amount of time, which material would be lower in temperature?
Wax
500
In this heating curve for water, at what temperature (in Fahrenheit) is there equilibrium between a liquid and a gas?
212 degrees fahrenheit