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

Homework Help: Ethylene reaction

  1. Feb 8, 2005 #1
    just a basic rookie question. What are the products when ethylene reacts with fluorine gas (i.e., burned in presence of fluorine)?

    I was given the following data:
    [itex]H_2 + F_2 \rightarrow 2HF \Delta H^{o} = -537 kJ [/itex]
    [itex]C + 2F_2 \rightarrow CF_4 \Delta H^{o} = -680 kJ [/itex]
    [itex]2C + 2H_2 \rightarrow C_2 H_4 \Delta H^{o} = +52.3 kJ [/itex]

    I used the starting formula [itex] C_2 H_4 + 4F_2 [/itex]

    I balanced out equations and got two possibilities, and I'm not sure which one to go with. In one, it forms 2 hydrogen molecules and 2 carbon tetrafluoride, and in the other it forms 1 C, 2 HF and 1 carbon tetrafluoride. BOTH of these balance out and I don't know which one to go with.
    Last edited: Feb 8, 2005
  2. jcsd
  3. Feb 8, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    Since the Fluorine is the most reactive element among the electronegative/nonmetal ones,i'd say that both reactions are in theory possible,since the fluorine has the power to knock both C and H from such compounds.However,i think that it may add(itonate ..??,is this the word) to the C_{2}H_{4} breaking the double bond and resulting something like
    C_{2}F_{2}H_{2}.However,i find the second reaction (almost) impossble.


    P.S.Any chemist is invited to express his/her opinion. :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook