I am looking for a reaction that the outcome of this reaction will give me CO2
gas this materials should be materials that I can eat 

I am willing to pay 25 $

I assume we´re not talking about industrial production of CO2 but
about rather small amounts.
Producing CO2 from is very easy. Just add vinegar to baking soda
(powder) and the bubbles produced will be CO2.
The chemical reaction is:

NaHCO3 + CH3COOH ???> NaCH3COO + H2O + CO2

(Please keep in mind that baking soda (poweder) should not be eaten
pure but dissolved in water.)

I hope this answers your question.
If you need more held please psot a request for clarification ans
I´´ll be happy to provide more help.


till-ga

Search strategy: No search done as I´m a chemist.

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Request for Answer Clarification by dmdm-ga on 27 Nov 2005 10:46 PST

Thank you for the answer but I need all the materials in the reaction
to be with the possibility to eat them

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Clarification of Answer by till-ga on 27 Nov 2005 10:54 PST

You can eat baking soda, as you know it is used to bake cakes. You
should however not consume it pure, dissolving in water will be the
right way.
Another idea is to use mineral water containing carbonic acids and add
vinegar (or just shake it), there will be CO2 produced.
If this does still not answer your question please provide more
information why you want to produce the CO2 from consumable goods.

till-ga

its very simple my friend.
take any of the food product like rice or fruits or bread or any thing you love .
take them in a test tube and some enzymes called as amylases,proteases
and glycolytic enzymes the result is formation of water and co2.
this process takes place naturally in our stomach which is called
biological combustion
                  ENZYMES
carbohydrates ------------------->co2 +h20
this is one simple example
The other one is

or take any food stuffs which have carbohydrates and heat with acids u
would get co2 liberated.
                       Heat
food(carboydrates)----------------->c02
                      Acid
HOPE THIS WOULD HELP U
Regards
search.etc-ga

It may be my limited imagination, but I can't think of a good reason
for doing this (to win a belching contest? to gross out your friends
more by passing gas? etc.)

In any case, there might be unintended consequences to generation of
large amounts of carbon dioxide by ingestion. Some carbon dioxide is
generated naturally in the stomach and some of it passes into the
intestine - the point being that carbon dioxide in the stomach can
pass to the intestine. If you create a lot of carbon dioxide in the
stomach, you may get a lot more carbon dioxide in the intestine and
have severe gas pains. More problematic would be some of the reactants
passing quickly into the intestine and generating carbon dioxide
there; you are unlikely to get rid of this intestinal gas by belching
- and you don't know how much pressure will build up in the intestine,
nor do you know if it might be enough to cause bursting or damage
leading to chronic intestinal problems.

" Chemical reactions in your stomach also produce some of the carbon
dioxide content of intestinal gas."

This quote is from

http://www.mayoclinic.com/health/Intestinal-gas/DG00048

If you can accept that biology is chemistry, you could use the
'reaction' of yeast and sugar in water ;
c12h22o11 + h2o + yeast => ethanol + co2