1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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