# Why does water have different properties than its constituent elements?

Aug 27, 2017

Because water is a stable molecule, with a large heat capacity......

#### Explanation:

We represent the synthesis reaction of water by:

${H}_{2} \left(g\right) + \frac{1}{2} {O}_{2} \left(g\right) \rightarrow {H}_{2} O \left(l\right) + \Delta$

Now this is a redox reaction in that hydrogen has been oxidized, and oxygen has been reduced to form a very stable molecule....And thus the molecular properties ARE distinct from the properties of the elemental reactants.

And moreover, to heat the $H - O$ bonds we have to supply much energy, and this tends to quench the energy supplied by a fire when we douse it. This is especially true given that water, for such a small molecule, is EXCEPTIONALLY dense, and is not even a gas under normal conditions.