The Chemistry of Hand Warmers

Main Chemicals, Compounds, Components

Hand warmers work as good as they do because of all the chemicals within all have a certain job, For example:

• Iron and Oxygen react producing heat
• Water is the medium in which the Iron and the Oxygen react
• Salt is a catalyst through the water speeding up the reaction
• Activated carbon acts like the charcoal in your grill and disperses the heat around the hand warmer
• Vermiculite insulates the reaction in the hand warmer so it lasts longer
• Cellulose takes up space/sometimes replaced with saw dust
• Polypropylene sack keeps the moisture within the hand warmer

Chemistry's Role

The heat given off by an air activated Hand warmer is caused by a chemical reaction . The iron within the hand warmer mixes with the oxygen in the air and oxides, because it gives off heat when it reacts the process is known as an exothermic oxidation.4Fe(s)+302(g)-> 2Fe203(s)

Background Research

The disposable hand warmer was invented in 1981 by Japan’s MyCoal Corporation which was then passed to their associate MyCoal USA.

Resources

http://en.wikipedia.org/wiki/Hand_warmer

http://en.wikipedia.org/wiki/Cellulose

http://en.wikipedia.org/wiki/Iron

http://en.wikipedia.org/wiki/Water

http://en.wikipedia.org/wiki/Activated_carbon

http://webmineral.com/data/Vermiculite.shtml

http://www.answerbag.com/q_view/1903778

http://www.skinet.com/skiing/articles/how-hand-warmers-are-made

http://homechemistry.blogspot.com/2008/03/hand-warmers.html

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