Example of an reaction

[dg_5021]

Does anyone know an example of a reaction which produces gas?

[chem_tr]

Hello, all metals with oxidation potential higher than that of hydrogen produces gas when treated with an acid. For example, zinc is a good metal to produce hydrogen gas:

Zn+H^{+}\rightarrow Zn^{2+}+H_2

If you need nitrogen gas, then try this:

(NH_4)_2Cr_2O_7 + heat\rightarrow N_2+Cr_2O_3+~H_2O

For oxygen, you'll use hydrogen peroxide with acids on metal ions or any reducible substance:

(NH_4)_2Cr_2O_7~+~H_2O_2~+~HCl \rightarrow CrCl_3~+~O_2~+~NH_4Cl~+~H_2O

Also, ammonium salts give ammonia with heating with an alkali:

NH_4Cl~+~NaOH \rightarrow NH_3

As a last example, carbon dioxide can be produced from carbonates:

Na_2CO_3~+~HCl \rightarrow CO_2

I hope these are helpful. There are plenty more examples, but these were what I remembered quickly and wrote. You'll have to balance (and write the other unimportant products) for some reactions.