http://www.instructables.com Sat, 25 May 2013 03:10:35 PDT BLOX v1.01 http://www.instructables.com/id/Vacuum-Chamber-Project-4-Freezing-while-Boiling-/ http://www.instructables.com/files/deriv/FFV/MHC4/FBU37ALM/FFVMHC4FBU37ALM.SQUARE2.jpg http://www.instructables.com/files/deriv/FFV/MHC4/FBU37ALM/FFVMHC4FBU37ALM.SQUARE.jpg http://www.instructables.com/files/deriv/FFV/MHC4/FBU37ALM/FFVMHC4FBU37ALM.SMALL.jpg kentchemistry.com This can actually happen. It seems unnatural, but the laws of physics don't lie. Liquids require heat to boil, and if the conditions are right one liquid can be boiled in order to freeze a second. Under a vacuum, the water in an acetone/water mixture can freeze while the acetone boils. Watch the vid...
By: kentchemistry.com

Continue Reading »]]> Fri, 1 Feb 2008 10:44:58 PST http://www.instructables.com/id/Vacuum-Chamber-Project-2-Boiling--Room-Temperatu/ http://www.instructables.com/files/deriv/F8Z/R5JZ/FBU346SQ/F8ZR5JZFBU346SQ.SQUARE2.jpg http://www.instructables.com/files/deriv/F8Z/R5JZ/FBU346SQ/F8ZR5JZFBU346SQ.SQUARE.jpg http://www.instructables.com/files/deriv/F8Z/R5JZ/FBU346SQ/F8ZR5JZFBU346SQ.SMALL.jpg kentchemistry.com A light layer of vacuum grease is applied to the rim of the belljar. Water at room temperature is placed inside and the vacuum pump is then used to evacuate the vessel. When the air pressure is reduced to the vapour pressure of water at room temperature the water will begin to boil.
By: kentchemistry.com

Continue Reading »]]> Thu, 24 Jan 2008 20:44:24 PST http://www.instructables.com/id/Mallomars-Transformers-in-a-Vacuum/ http://www.instructables.com/files/deriv/FMO/L0QF/FBU346U7/FMOL0QFFBU346U7.SQUARE2.jpg http://www.instructables.com/files/deriv/FMO/L0QF/FBU346U7/FMOL0QFFBU346U7.SQUARE.jpg http://www.instructables.com/files/deriv/FMO/L0QF/FBU346U7/FMOL0QFFBU346U7.SMALL.jpg kentchemistry.com When Mallomars are placed into a vacuum they go through a cool transformation. The marshmallow inside expands and breaks throught the chocolate coating. Interestingly, when the pressure is reapplied the mallomars go back to its original cookie shape. This is a great demonstration of Boyle's Law. P...
By: kentchemistry.com

Continue Reading »]]> Thu, 24 Jan 2008 20:20:56 PST http://www.instructables.com/id/Vacuum-Chamber-Project-1-Shaving-Cream-Experiment/ http://www.instructables.com/files/deriv/F5O/YVGP/FBU346WQ/F5OYVGPFBU346WQ.SQUARE2.jpg http://www.instructables.com/files/deriv/F5O/YVGP/FBU346WQ/F5OYVGPFBU346WQ.SQUARE.jpg http://www.instructables.com/files/deriv/F5O/YVGP/FBU346WQ/F5OYVGPFBU346WQ.SMALL.jpg kentchemistry.com Music: Kevin MacLeod Shaving cream is placed into a vacuum chamber, then the vacuum is turned on. The chemicals are arranged such that there are many pockets of air trapped inside the shaving cream. The air pockets in shaving cream will expand in a vacuum. As the pressure gradually decreases the v...
By: kentchemistry.com

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