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| ||<:30%>[[PiraScheme#Thermodynamics| Table of Thermodynamics Demonstration]]||<:30%>[[TDEquipmentList| Thermodynamics Equipment List]]||<:30%>[[Demonstrations|Lecture Demonstrations]]|| |
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| '''Topic and Concept:''' Thermal Properties of Matter, [[ThermalProperties#Thermometry| 4A30. Thermometry]] |
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| * '''Cabinet:''' Thermodynamics Cabinet * '''Bay:''' (A3) |
* '''Cabinet:''' [[ThermoCabinet|Thermodynamics (TD)]] * '''Bay:''' [[ThermoCabinetBayA3|(A3)]] |
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| (attachment photo showing the fully set up demonstration) | {{attachment:4A30-22_01.jpg}} |
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| '''Description:''' | '''Abstract:''' |
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| ||A brass plate with a hole||[:ThermoCabinetBayA3: TD, A3, Shelf #1]||<:> 4A30.22 || ||A ball||[:ThermoCabinetBayA3: TD, A3, Shelf #1]||<:> 4A30.22 || |
||A brass plate with a hole||[[ThermoCabinetBayA3| TD, A3, Shelf #1]]||<:> 4A30.22 || ||Two balls||[[ThermoCabinetBayA3| TD, A3, Shelf #1]]||<:> 4A30.22 || |
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| ||Safety grove and glasses||location||<:>NA || | ||Liquid Nitrogen||location||<:> NA || ||Safety glove and glasses||location||<:>NA || |
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| '''Setup:''' | '''''Important Setup Notes:''''' * Make sure that one of the red & white gas cart are in placed and the gas hose is connected to the utility trench gas line. The gas cylinder that supplies the gas to utility trench gas line may or may not be connected/installed and should be inspected. |
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| 1. Make sure you have the balls with two sizes, the brass plate with hole in the middle, and the stand. | '''Setup and Procedure:''' 1. Make sure you have the balls with two sizes, one is over and one is under the hole size, the brass plate with hole in the middle, and the stand. 1. Have the liquid nitrogen in the holder. Option A. Shrink or extended ball 1. Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot. 1. Heat the smaller ball or put the larger ball in the liquid nitrogen, this will make the opposite situation from the previous. Option B. Extended Hole |
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| 1. Demonstrate to students again, this time both of the balls can get through the hole. | 1. Demonstrate to students again, this time both balls should get through the hole. |
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| 1. Beware of the heated plate. | * Beware of the heated plate. |
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| '''Demonstration:''' | '''Discussion:''' |
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| When the plate is heated, it expands due to | When the plate is heated, it expands the hole in the middle of the plate. [The molecular bonds are lengthened, when the material expands. Try to think in this way, a group of people standing in a tight circle with elbows linked. Then they lengthen their "bonds" by moving to hold hands at arms length. They also have to expand the circle by standing back, while they all stand further apart. This is like the molecular bonds around the hole.] So the ball can get through it. You have two options to show student by following. |
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| ||attachment other photos||attachment other photos|| ||attachment other photos||attachment other photos|| |
||{{attachment:4A30-22_01a.jpg}}||{{attachment:4A30-22_02a.jpg}}||attachment other photos||attachment other photos|| '''Videos:''' * [[https://www.youtube.com/user/LectureDemostrations/videos?view=1|Lecture Demonstration's Youtube Channel]] |
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| * [[https://en.wikipedia.org/wiki/Thermal_expansion|Wikipedia - Thermal Expansion]] * [[http://en.wikipedia.org/wiki/Coefficient_of_thermal_expansion|Wikipedia - Coefficient of Thermal Expansion]] |
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| 1. List any references | |
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| [:ThermalProperties:Thermal Properties of Matter] [:Demonstrations:Demonstrations] [:Instructional:Home] |
[[Instructional|Home]] |
Balls and Plate , 4A30.22
Topic and Concept:
Thermal Properties of Matter, 4A30. Thermometry
Location:
Cabinet: Thermodynamics (TD)
Bay: (A3)
Shelf: #1
Abstract:
Insert description of apparatus, its component, what it is demonstrating.
Equipment |
Location |
ID Number |
|
|
|
A brass plate with a hole |
4A30.22 |
|
Two balls |
4A30.22 |
|
Burner |
location |
NA |
Liquid Nitrogen |
location |
NA |
Safety glove and glasses |
location |
NA |
Important Setup Notes:
Make sure that one of the red & white gas cart are in placed and the gas hose is connected to the utility trench gas line. The gas cylinder that supplies the gas to utility trench gas line may or may not be connected/installed and should be inspected.
Setup and Procedure:
- Make sure you have the balls with two sizes, one is over and one is under the hole size, the brass plate with hole in the middle, and the stand.
- Have the liquid nitrogen in the holder. Option A. Shrink or extended ball
- Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot.
- Heat the smaller ball or put the larger ball in the liquid nitrogen, this will make the opposite situation from the previous. Option B. Extended Hole
- Demonstrate to students that the smaller ball can get through the hole and the larger ball cannot.
- Heat the ball by the burner until you sure that the hole get larger than before.
- Demonstrate to students again, this time both balls should get through the hole.
Cautions, Warnings, or Safety Concerns:
- Beware of the heated plate.
Discussion:
When the plate is heated, it expands the hole in the middle of the plate. [The molecular bonds are lengthened, when the material expands. Try to think in this way, a group of people standing in a tight circle with elbows linked. Then they lengthen their "bonds" by moving to hold hands at arms length. They also have to expand the circle by standing back, while they all stand further apart. This is like the molecular bonds around the hole.] So the ball can get through it. You have two options to show student by following.
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attachment other photos |
attachment other photos |
Videos:
References: