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!

Predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)-> 3CO2(g) + 4H2

  1. Oct 10, 2013 #1
    predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)---> 3CO2(g) + 4H2

    1. The problem statement, all variables and given/known data

    predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)---> 3CO2(g) + 4H20(l)


    The same question for N205(g) --> NO2(g) + NO3(g)
    2. Relevant equations



    3. The attempt at a solution

    I said the first was negative because it is combustion rxn and is more stable after the rxn.

    The second one I said positive because now you have more molecules?

    Good or no? Thanks
     
  2. jcsd
  3. Jan 19, 2017 #2

    TeethWhitener

    User Avatar
    Science Advisor
    Gold Member

    You're looking for a change in entropy. In general, the system with a larger number of moles of gaseous molecules has the higher entropy.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)-> 3CO2(g) + 4H2
Loading...