do now which statement describes the transfer of heat energy that occurs when an ice cube is added...
TRANSCRIPT
Do Now
Which statement describes the transfer of heat energy that occurs when an ice cube is added to an insulated container with 100 milliliters of water at 25°C?
1. Both the ice cube and the water lose heat energy.
2. Both the ice cube and the water gain heat energy.
3. The ice cube gains heat energy and the water loses heat energy.
4. The ice cube loses heat energy and the water gains heat energy.
Physical Properties of Matter, Part 3WILLIAMSBURG HIGH SCHOOL FOR ARCHITECTURE AND DESIGN
MR. QUINN AND MS. TOM
9/12/13
Hypotheses
If energy is added to a sample of ice at a constant rate, will the temperature of the sample change at a constant rate from -20 C to 120 C?
If energy is added to a sample of ice at a constant rate, the temperature of the sample will change at a constant rate from -20°C to 120°C.
If energy is added, the temperature will change constantly.
No, Because energy is being added at a constant rate. This means that the ice would reach 120 degrees Celsius over time. If energy is added at a large rate then the ice would skip becoming a liquid and go straight to gas.
Aim: What role does potential energy play in heating and cooling?
A new type of energy?
Potential Energy
What is it? The ability to do work in the future
Types Gravitational
The object could gain energy from falling
Things that are high up have high GPE
Chemical
The ability to react with other chemicals in the future
Ask yourself: could I burn it?
Another???
Aim: What role does potential energy play in heating and cooling?
The Data
Time Temperature
0 -20
0.5 -15
1.0 -11
1.5 -5
2.0 0
2.5 0
3.0 0
3.5 10
4.0 25
Time Temperature
4.5 39
5.0 54
5.5 70
6.0 83
6.5 99
7.0 98
7.5 99
8.0 112
8.5 130
Aim: What role does potential energy play in heating and cooling?
Graph of the Data, Part 1
0 0.5 1 1.5 2 2.5
-25
-20
-15
-10
-5
0
Temperature vs. Time
Time (Minutes)
Tem
pera
ture
(C
els
ius)
Aim: What role does potential energy play in heating and cooling?
Graph of the Data, Part 2
0 0.5 1 1.5 2 2.5 3 3.5
-25
-20
-15
-10
-5
0
Temperature vs. Time
Time (Minutes)
Tem
pera
ture
(C
els
ius)
Aim: What role does potential energy play in heating and cooling?
Graph of the Data, Part 3
0 1 2 3 4 5 6 7
-40
-20
0
20
40
60
80
100
120
Temperature vs. Time
Time (Minutes)
Tem
pera
ture
(C
els
ius)
Aim: What role does potential energy play in heating and cooling?
Graph of the Data, Part 4
0 1 2 3 4 5 6 7 8
-40
-20
0
20
40
60
80
100
120
Temperature vs. Time
Time (Minutes)
Tem
pera
ture
(C
els
ius)
Aim: What role does potential energy play in heating and cooling?
Full Data Set
0 1 2 3 4 5 6 7 8 9
-40
-20
0
20
40
60
80
100
120
140
Temperature vs. Time
Time (minutes)
Tem
pera
ture
(Cel
sius)
Aim: What role does potential energy play in heating and cooling?
Vs. Regents… Round 1, FIGHT!
Which statement describes what happens to the energy of the particles of the sample during time interval DE?
1. Average kinetic energy increases, and potential energy remains the same.
2. Average kinetic energy decreases, and potential energy remains the same.
3. Average kinetic energy remains the same, and potential energy increases.
4. Average kinetic energy remains the same, and potential energy decreases
Vs. Regents… Round 2, FIGHT!
During which intervals is potential energy decreasing and average kinetic energy remaining constant?
1. AB and BC
2. AB and CD
3. DE and BC
4. DE and EF