Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: What causes the H bonds in water molecules to last only 10^-11 sec?

  1. May 13, 2008 #1
    I have thought of two possible explanations:

    a) Energy required to break H bonds = Energy released when H bonds form.
    There is a "constant" equilibrium in the system, meaning, some water molecules form H bonds, releasing energy to the environment which causes other water molecules to loose their H bonds, and this could on forever if isolated.

    b) The H bonds last so little because the e- density in the water molecules change, the partially charged zones of the molecule are not constant and they change over time breaking the H bonds between the water molecules.

    Which one is correct(if any)?
     
  2. jcsd
  3. May 13, 2008 #2
    i would suggest that it is because the water molecules are constantly moving around because they possess kinetic energy.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook