1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Change in enthalpy and entropy

  1. May 15, 2008 #1
    Why is it that the change in enthalpy and entropy of a reaction often can be assumed not to depend on temperature?
  2. jcsd
  3. May 15, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    You've been posting long enough to know that you must do your work before anyone can help you. So what are your thoughts on the matter? Are the enthalpy and entropy of reactants and products constant? If they change with temperature, is the rate of change the same for all reactants and products?
  4. May 21, 2008 #3
    It is a simplification in early undergrad chemistry. When you get to real thermodynamics, you will see that this is not true, they will give you the tools then that will aid you.

    Although in some cases the change in enthalphy is so small according to temperature that you can use a weighted value.
  5. May 27, 2008 #4
    But why?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Change enthalpy entropy Date
Chemistry: enthalpy change May 21, 2017
Enthalpy change of a neutralisation reaction Mar 3, 2017
Hess's law explanation Feb 22, 2017
Enthalpy Change and Bond Energies Dec 27, 2015
Physical Chemistry Oct 8, 2015