Reactions+That+Release+Gases

=Reactions That Form Gases= By Nate Trona and Braden Young

Here are some common gases that can form from metathesis reactions.

(From the Ultimate Chemical Equations Handbook)
 * H 2 S || Any sulfide plus any acid form H 2 S and a salt ||
 * CO 2 || Any carbonate plus any acid form CO 2, H 2 O and a salt ||
 * SO 2 || Any sulfite plus any acid form SO 2, H 2 O, and a salt ||
 * NH 3 || Any ammonium salt plus any soluble strong strong hydroxide react upon heating to form NH 3, H 2 O and a salt ||

The way that gases are formed in metathesis reactions is that a neutral molecule is formed and the molecule has a low boiling point and low solubility in water, which would in turn release the gas into the air. An example of a metathesis reaction is:

NH 4 Cl + NaOH = NH 3 + H2O + NaCl

FUN FACT: Here's a very useful gas-releasing reaction that could save your life. In an airbag there is sodium trinitride, potassium nitrate, and silicon oxide. The head on collision ignites the reaction. After a series of reactions, nitrogen gas is released which fills up the airbag and inflates it instantly.

 N2 (g) || KNO3 || K2O Na2O N2 (g) || Na2O SiO2 || alkaline silicate (glass) || This table summarizes the species involved in the chemical reactions in the gas generator of an airbag. **Note:** Stoichiometric quantities are not shown. || (From http://www.chemistry.wustl.edu/~courses/genchem/Tutorials/Airbags/Gasgeneration.htm)
 * ===Gas-Generator Reaction=== || === Reactants === || === Products === ||
 * **Initial Reaction Triggered by Sensor.** || NaN3 || Na
 * **Second Reaction.** || Na
 * **Final Reaction.** || K2O
 * ===Table 1===