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

Activation Energy

  1. Jun 1, 2005 #1
    Is activation energy dependent?

    I think it isn't, but if you rearrange the Arrhenius equation you get:
    Ea - activation energy
    Ea = RT(lnA - lnk)
    so as temperature Ea can change. But I am thinking that k will also change in relation so Ea is constant?
  2. jcsd
  3. Jun 2, 2005 #2
    Ea is temp. independent, K will change with a change in T. So if T changes the -lnK factor will change so Ea will always be constant. A classical chemistry experiment at universities is plotting lnK vs. 1/T. The rate of the reaction at different temperatures is recorded in the lab. From the straight line in plot of lnk vs 1/T you can calculate the slope and the slope is equal to Ea/R.
  4. Jun 3, 2005 #3
    ok thanks very much.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Activation Energy
  1. Activation energy? (Replies: 4)

  2. Activation Energy type (Replies: 10)

  3. Activation energy (Replies: 1)