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

Adsorption of hydrogen by palladium

  1. Mar 5, 2007 #1
    How does hydrogen gas get into a piece of palladium metal such that the amount of hydrogen is 900 times the volume of palladium?A strong pump would be required to put 900 times the volume of a gas cylinder into the cylinder or the hydrogen would have to have its temperature lowered first.
    Heat is evolved as hydrogen goes into the palladium - is this the hydrogen being cooled or pd-h bonds forming?
  2. jcsd
  3. Mar 5, 2007 #2
    I do not if there's any Pd-H bond formed when H2 comes into palladium, but part of the heat is due to the entropy following the term : T*deltaS.
    Volume is reduced and so is entropy.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook