Paramagnetism of Liquid Oxygen, 5G30.20

Topic and Concept:

Magnetic Materials, [:MagneticMaterials#ParamagDiamag: 5G30. Paramagnetism and Diamagnetism]

Location:

Cabinet: [:EMCabinet:(E&M)]
Bay: [:EMCabinetLtBayA3:(A3)]
Shelf: #5

attachment:Setup02-400.jpg

Abstract:

Liquid oxygen is trapped in a strong magnetic field until it evaporates.

Equipment	Location	ID Number

Aluminum Channel	E&M-Left Side Cabinet, Bay A3, Shelf #5
Liquid N2 (Main Supply)	Loading dock
Water Bottle	Supply own (or look in trash/recycling)
Small Dewar	Glassware cabinet
Stand with Clamp	Rod and clamp cabinet

Important Setup Notes:

This demonstration requires a 24 hour notice.
This demonstration requires about 1 L of liquid N2.
It takes roughly 20 minutes to make enough liquid air for this demonstration.

Setup and Procedure:

Use clamp to attach water bottle to stand.
Fill the bottle with liquid nitrogen.
Pre-cool the small dewar by pouring in about 200 mL of liquid nitrogen.
Allow the nitrogen to stop boiling, and then pour it out.
Lower the bottle into the dewar. After 20 minutes, about 50 mL of liquid air will have condensed in the small dewar.
On the higher side of the steel channel relative to the magnets, pour the liquid air into the channel.
The oxygen component of the liquid air will be trapped in the magnetic field while the rest runs off.

Cautions, Warnings, or Safety Concerns:

Exercise great care when handling the liquid N2 - it can cause severe frost bite!
NEVER put a cap on the container containing the liquid N2! Doing so would create a very DANGEROUS device that will explode sending shards of plastic into the audience.
Liquid oxygen is EXTREMELY FLAMIBLE! Keep away from sparks or sources of open flame.

Discussion:

Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate.

attachment:ChannelBigSmallDewars02-250.jpg	attachment:Channel04-250.jpg	attachment:Channel01-250.jpg	attachment:SmallDewars02-250.jpg
attachment:SmallDewars04-250.jpg	attachment:SmallDewars05-250.jpg	attachment:BottleStand01-250.jpg	attachment:BottleStand02-250.jpg

Videos:

[http://youtu.be/UfYExGQrkwM The Paramagnetism of Liquid Oxygen, 5G30.20]
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]

References:

[http://en.wikipedia.org/wiki/Paramagnetism Paramagnetism - Wikipedia]
[http://en.wikipedia.org/wiki/Liquid_oxygen Liquid Oxygen - Wikipedia]

[:Instructional:Home]

fw: Paramagnetism_of_Liquid_Oxygen (last edited 2013-07-12 18:17:40 by localhost)

-  ⇤ ← Revision 2 as of 2012-06-22 23:45:18 → 
  Size: 1645
  Editor: srnarf
  Comment:
+   ← Revision 12 as of 2012-06-25 18:38:52 → ⇥
  Size: 3204
  Editor: srnarf
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
-||<:30%>[:PiraScheme#Mechanics: Table of Mechanics Demonstration]||<:30%>[:MEEquipmentList: List of Mechanics Equipment & Supplies]||<:30%>[:Demonstrations:Lecture Demonstrations]||
+||<:30%>[:PiraScheme#ElectricityAndMagnetism: Table of Electricity & Magnetism Demonstration]||<:30%>[:EMEquipmentList: List of Electricity & Magnetism Equipment & Supplies]||<:30%>[:Demonstrations:Lecture Demonstrations]||
 Line 10:
- * '''Cabinet:''' [:MechanicsCabinet:Mechanic (ME)]
 * '''Bay:''' [:MechanicsCabinetBayA1:(A1)]
 * '''Shelf:''' #1,2,3..
+ * '''Cabinet:''' [:EMCabinet:(E&M)]
 * '''Bay:''' [:EMCabinetLtBayA3:(A3)]
 * '''Shelf:''' #5
 Line 14:
- attachment: mainPhoto
+attachment:Setup02-400.jpg
 Line 22:
-||Steel Channel|| || ||
||Liquid N2|| || ||
||Water Bottle|| || ||
||Small Dewar|| || ||
+||Aluminum Channel ||E&M-Left Side Cabinet, Bay A3, Shelf #5 || ||
||Liquid N2 (Main Supply)||Loading dock|| ||
||Water Bottle || Supply own (or look in trash/recycling)|| ||
||Small Dewar || Glassware cabinet|| ||
||Stand with Clamp || Rod and clamp cabinet || ||
-Line 30:
+Line 31:
+ * '''''This demonstration requires about 1 L of liquid N2.'''''
 * '''''It takes roughly 20 minutes to make enough liquid air for this demonstration.'''''
-Line 34:
+Line 37:
-. List steps for setup then procedure.
 1. ...
+. Use clamp to attach water bottle to stand.
 1. Fill the bottle with liquid nitrogen.
 1. Pre-cool the small dewar by pouring in about 200 mL of liquid nitrogen.
 1. Allow the nitrogen to stop boiling, and then pour it out.
 1. Lower the bottle into the dewar. After 20 minutes, about 50 mL of liquid air will have condensed in the small dewar.
 1. On the higher side of the steel channel relative to the magnets, pour the liquid air into the channel.
 1. The oxygen component of the liquid air will be trapped in the magnetic field while the rest runs off.
-Line 38:
+Line 46:
- *
+ * '''Exercise great care when handling the liquid N2 - it can cause severe frost bite!'''
 * '''NEVER put a cap on the container containing the liquid N2! Doing so would create a very DANGEROUS device that will explode sending shards of plastic into the audience.'''
 * '''Liquid oxygen is EXTREMELY FLAMIBLE! Keep away from sparks or sources of open flame.'''
-Line 45:
+Line 55:
-||attachment: photo||attachment: photo||attachment: photo||attachment: photo||
+||attachment:ChannelBigSmallDewars02-250.jpg||attachment:Channel04-250.jpg||attachment:Channel01-250.jpg||attachment:SmallDewars02-250.jpg||
||attachment:SmallDewars04-250.jpg||attachment:SmallDewars05-250.jpg||attachment:BottleStand01-250.jpg||attachment:BottleStand02-250.jpg||
-Line 53:
+Line 64:
- * List any references
+ * [http://en.wikipedia.org/wiki/Paramagnetism Paramagnetism - Wikipedia]
 * [http://en.wikipedia.org/wiki/Liquid_oxygen Liquid Oxygen - Wikipedia]

fw: Diff for "Paramagnetism_of_Liquid_Oxygen"

Paramagnetism of Liquid Oxygen, 5G30.20