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

Using Standard Molar Entropy

  1. Feb 28, 2012 #1
    I know this is more of a chemistry question but it's come to this I'm afraid.
    When calculating entropy changes in chemical reactions sometimes we students of chemistry use standard molar entropies of the reactants and products. But this surely doesn't account for the mixing effect. e.g.
    N2 + 3 H2 --> 2 NH3
    calculating the entropy change reaction for this using standard molar entropies would surely yield an entropy change too large because the reactants would in fact start off mixed, thus at a higher entropy than just the N2 and 3 H2 together.
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted