Carbon generates heat?
Hello, guyz..Have you guyz seen those warm hand pads?Do they react carbon with metal to generate heat? Or how do they generate heat? Could you please tell me how it works?
Answer:
How it works:
What if you could somehow super cool the water? That is, say that you could get the water's temperature to 10 degrees below freezing without it crystallizing into a solid (you can sometimes do this using a very clean glass and distilled water so there are no points for the water to begin crystallizing). In this condition you can tap the glass and the temperature of the water will jump up to 32 degrees F/0 degrees C and the water will solidify quickly.
Our magic heating pads contain sodium acetate and water. It turns out that sodium acetate is very good at super cooling. It "freezes" at 130 degrees F or 54 degrees C, but it is happy to exist as a liquid at a much lower temperature and is extremely stable. Clicking the disk, however, has the ability to force a few molecules to flip to the solid state, and the rest of the liquid then rushes to solidify as well. The temperature of the solidifying liquid jumps up to 130 degrees F or 54 degrees C in the process.
When you boil the solid you melt it back to the liquid state. You have to completely melt every crystal or the liquid will quickly re-solidify. You can repeat this cycle thousands of times, just as you can freeze and melt water as many times as you like.
Some hand warmers contain cellulose, iron, water, activated carbon, vermiculite and salt and produce heat from the exothermic oxidation of iron when exposed to air.
the word exothermic describes a process or reaction that releases energy in the form of heat
Oxidation describes the loss of electrons by a molecule, atom or ion
activated carbon has a high energy and need to be stabilize, the carbon will be reacted wiith iron to stabilized the carbon. this reaction releases energy in the form of heat.
For Warm hand pads, PVC material is formulated and produced using an FDA approved stabilizer system and a plasticizer combination that has been shown to be non-sensitizing in skin-contact applications. Liquid ingredients consist of sodium acetate and water which is food grade material...
Go to LIBRARY....and read books??.
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Answer:
How it works:
What if you could somehow super cool the water? That is, say that you could get the water's temperature to 10 degrees below freezing without it crystallizing into a solid (you can sometimes do this using a very clean glass and distilled water so there are no points for the water to begin crystallizing). In this condition you can tap the glass and the temperature of the water will jump up to 32 degrees F/0 degrees C and the water will solidify quickly.
Our magic heating pads contain sodium acetate and water. It turns out that sodium acetate is very good at super cooling. It "freezes" at 130 degrees F or 54 degrees C, but it is happy to exist as a liquid at a much lower temperature and is extremely stable. Clicking the disk, however, has the ability to force a few molecules to flip to the solid state, and the rest of the liquid then rushes to solidify as well. The temperature of the solidifying liquid jumps up to 130 degrees F or 54 degrees C in the process.
When you boil the solid you melt it back to the liquid state. You have to completely melt every crystal or the liquid will quickly re-solidify. You can repeat this cycle thousands of times, just as you can freeze and melt water as many times as you like.
Some hand warmers contain cellulose, iron, water, activated carbon, vermiculite and salt and produce heat from the exothermic oxidation of iron when exposed to air.
the word exothermic describes a process or reaction that releases energy in the form of heat
Oxidation describes the loss of electrons by a molecule, atom or ion
activated carbon has a high energy and need to be stabilize, the carbon will be reacted wiith iron to stabilized the carbon. this reaction releases energy in the form of heat.
For Warm hand pads, PVC material is formulated and produced using an FDA approved stabilizer system and a plasticizer combination that has been shown to be non-sensitizing in skin-contact applications. Liquid ingredients consist of sodium acetate and water which is food grade material...
Go to LIBRARY....and read books??.
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