Sciencemadness Discussion Board » Fundamentals » Chemistry in General » substance that creates heat Select A Forum Fundamentals   » Chemistry in General   » Organic Chemistry   » Reagents and Apparatus Acquisition   » Beginnings   » Responsible Practices   » Miscellaneous   » The Wiki Special topics   » Technochemistry   » Energetic Materials   » Biochemistry   » Radiochemistry   » Computational Models and Techniques   » Prepublication Non-chemistry   » Forum Matters   » Legal and Societal Issues

Author: Subject: substance that creates heat
Innovative
Harmless

Posts: 1
Registered: 4-5-2003
Member Is Offline

Mood: No Mood

substance that creates heat

I need help from someone that has chemestry experties. I was wondering if there was a substance or material that would create a moderate amount of heat when in contact with water or moisture. Preferably a non-toxic material/substance. Or possibly a substance that does not drop below freezeing. I have an Idea for a new product so any help with this would greatly beneifit us both financially. Any good ideas e-mail me at smyth915@aol.com thanks in advance.
FireFly
Harmless

Posts: 8
Registered: 2-2-2003
Location: WV
Member Is Offline

Mood: No Mood

Well i'm not sure if this is what your looking for, but Calcium carbide, Sodium, and Potassium all generate some heat when they make contact with water, but not enough to warm anything of any extent, and it wouldn't be a good idea to breath the fumes for any lenght of time. Hopfully this was of some help, but as far as something that would produce enough heat to warm a house or something I don't know of a substance that exsits.
~NP
Blind Angel
International Hazard

Posts: 845
Registered: 24-11-2002
Location: Québec
Member Is Offline

Mood: Meh!

If you mean melting the snow so you don't have to shove it (like i want to), salt can be a start but not enough, the other idea i had is not exactly chemistry but a net of iron wire plugged on DC with resistor can do the job... sodium and other alkali metal wont be i good idea i think since they react very violently, no idea for the calcium carbide though

/}/_//|//) /-\\/|//¬/=/_
My PGP Key Fingerprint: D4EA A609 55E4 7ADD 8529 359D D6E2 33F6 4C76 78ED
fluffy bunny
Harmless

Posts: 25
Registered: 17-10-2002
Location: Australia
Member Is Offline

Mood: No Mood

If its a solid material you are after which will produce considerable heat when dissolved/added to water, yet not create a violent reaction then sodium hydroxide is your best bet. As a pure substanse it IS toxic, but it will not create toxic fumes on reaction with water. With the right amount you can get water from simply warm or to boiling hot by adding the right amount. It can also easily be bought at the supermarket.
What is it you need such a substance for?
I am a fish
undersea enforcer

Posts: 600
Registered: 16-1-2003
Location: Bath, United Kingdom
Member Is Offline

Mood: Ichthyoidal

Calcium Oxide (quicklime) reacts with water to produce calcium hydroxide and heat. This reaction is used in some self-heating food cans.

1f /0u (4|\\| |234d 7|-|15, /0u |234||`/ |\\|33d 70 937 0u7 /\\/\\0|23.
Haggis
Hazard to Others

Posts: 238
Registered: 1-12-2002
Location: Mid-America.
Member Is Offline

Mood: Lacrymating

What exactly are you looking for? Are you looking for something that will resist freezing or something that will warm something up to keep people warm, like a handwarmer. Or is it something that will cook food from a chemical reaction? This will help us very much in order to solve your problem.
Darkfire
National Hazard

Posts: 292
Registered: 3-1-2003
Location: California
Member Is Offline

Mood: Wondering

Sodium hydroxide and water, along with sufuric acid and water.

CTR

\"I love being alive and will be the best man I possibly can. I will take love wherever I find it and offer it to everyone who will take it. I will seek knowledge from those wiser and teach those who wish to learn from me.\" Duane Allman
NERV
Hazard to Others

Posts: 152
Registered: 22-9-2002
Location: USA
Member Is Offline

Mood: Fluorinated

You could use a mix of ammmonium nitrate 28%, ammonium chloride 3%, and zinc dust 69%, by weight. This mix will ignite on contact with water.

Vir sapit qui pauca loquitur.
Haggis
Hazard to Others

Posts: 238
Registered: 1-12-2002
Location: Mid-America.
Member Is Offline

Mood: Lacrymating

The bad thing about that mix is that the ammonium nitrate draws in water (hydroscopic) and the moisture content evenually makes the mixute spontaneously combust. Good luck when the first kid with sweaty hands opens up the packet to 'see what's inside'. If the packaging is something such as a sealed tin with a 'fresh lock' or something simliar on top, it might work. Pull the tab, add water, cook food. Seems like it would work well for MREs too. Soldiers could just spit into the can for it to start burning. Or it could be used effectively as 'emergency fire source'. The could be sealed tightly and stored in first aid kits, hiker bags, etc. When they get lost and need something to start their fire and they have no matches, they could just build a 'tent' of wood. Then they can pull the top off and get it wet somehow. The green flame can also be used as a signal flare, depending how the material is packaged or pressed.

 Sciencemadness Discussion Board » Fundamentals » Chemistry in General » substance that creates heat Select A Forum Fundamentals   » Chemistry in General   » Organic Chemistry   » Reagents and Apparatus Acquisition   » Beginnings   » Responsible Practices   » Miscellaneous   » The Wiki Special topics   » Technochemistry   » Energetic Materials   » Biochemistry   » Radiochemistry   » Computational Models and Techniques   » Prepublication Non-chemistry   » Forum Matters   » Legal and Societal Issues