“ Originally Posted by thinking
can you give me the posts that FULLY explains this
It seems I've missed them ”
Sure.
“ Originally Posted by thinking
I've said this before ;
we know what constituents water , H2O , we seem to know the chemical reaction
yet what we don't know is why the chemicals , (2) H -hydrogen and (1) O- oxygen , together , should produce a liquid at room temperature
( remember H , is a liquid at -256C and O is liquid at -236C ) ”
“ Originally Posted by Trippy
Water is seldomn neutral in nature, but then, pure water is seldom found in nature.
Water is neutral in pH because the same molecule that gives a proton, leaves behind a Hydroxide ion, this 1 to 1 stoichiometry gives it a neutral pH.
Water is electrically neutral, yes, however an individual water molecule has an over all electric dipole - the Oxygen atom holds the electrons more closely to it then the hydrogen atoms do, giving the hydrogen atoms a slight positive charge, and the oxygen atom a slight negative charge (see electronegativity).
Water is liquid at room temperature, unlike the other Group 16 Hydrides (or the Hydrides on either side of it) because the dipole moment is strong enough, and the water can form hydrogen bonds enough that it has a substantially elevated boiling point.
Ammonia and Hydrogen Fluoride also form hydrogen bonds, however, Ammonia has fewer free non bonding electrons then water, and Hydrogen Fluoride has fewer hydrogens.
Water just happens to fill that niche where the Oxygen is small enough and electronegative enough that it can form a strong dipole moment and the molecule can form more than one hydrogen bond per molecule (as opposed to Ammonia and Hydrogen fluoride which can only form one per molecule). ”
“ Originally Posted by Trippy
****MODERATOR NOTE****
The question that is being posed has been answered.
Why is water a liquid at room temperature? Because of a combination of its strong electric dipole moment, and ability to form multiple Hydrogen Bonds - both of which are simply products of its location on the Periodic table.
It's a second row element meaning it has a high electron affinity (or electronegativity) this results in a strong dipole moment, because Hydrogen has a low electron affinity (demonstrated by how easily oxidized it is).
This combines with the fact that each molecule has two lone pairs, and two protons to give water particularly strong intermolecular bonding, as can be seen by observing the trends in the surrounding hydrides.
Any questions as to whether Water is greater than the "sum of it's parts" (whatever that actually means) are of a pseudophilosophical nature, as such, this thread has been moved to the Pseudoscience forum. ” [/QUOTE]
THANKS Trippy
appreciated