Chemistry

OF2(g) + H2O(g) -> O2(g) +2HF(g) ΔH°rxn = -318 kJ

Using bond energies, calculate the bond dissociation energy of the O-F bond, in OF2.


This is the question and I got 438 as the answer, which is wrong. I don't know what I did wrong??

  1. 👍 0
  2. 👎 0
  3. 👁 236
asked by Kat
  1. If you will post your work I'll try to find the error. I found numbers in my book and you might check what you used. If I didn't skip a line, I read
    O=O = 498
    O-H = 464
    HF = 569
    Your numbers may differ since we aren't using the same text (I sure of that) but they should be close.

    1. 👍 0
    2. 👎 0
    posted by DrBob222
  2. So I have
    O=O = 498
    O-H = 436
    HF = 565

    -318 = (x+436) - (498+565)
    Since reaction=broken-made

    -318 = x+436 - 1063

    745 = x + 436

    x= 309

    Isn't this what you are supposed to do? :(

    1. 👍 0
    2. 👎 0
    posted by Kat

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    OF2(g) + H2O(g) -> O2(g) +2HF(g) ΔH°rxn = -318 kJ Using bond energies, calculate the bond dissociation energy of the O-F bond, in OF2. This is the question and I got 438 as the answer, which is wrong. I don't know what I did

    asked by Kat on May 1, 2011
  2. Chem

    Calculate the enthalpy change in the reaction of H2 with F2 to produce HF. The H–H and F–F bond energies are 436 and 155 kJ/mol, respectively, and the H–F bond energy is 567 kJ/mol H2 (g) + F2 (g) --> 2HF (g)

    asked by Erin on December 5, 2017
  3. Chem

    Calculate the enthalpy change in the reaction of H2 with F2 to produce HF. The H–H and F–F bond energies are 436 and 155 kJ/mol, respectively, and the H–F bond energy is 567 kJ/mol H2 (g) + F2 (g) --> 2HF (g)

    asked by Erin on December 5, 2017
  4. Chemistry

    Why is the Ge-F bond energy so much more than the Ge-Cl bond energy? 1. Covalent bond energies generally increase as you go down the periodic table 2. Covalent bond energies generally decrease as you go down the periodic table 3.

    asked by ss01 on October 13, 2013
  5. chem

    Are bond energies (single and multiple bonds) applicable only to gas phase?? For instance, I can use the bond energy data to calculate for enthalpy of reaction for the formation of water: 2 H2(g) + O2(g) -> H2O(g) But I can't

    asked by Namie on September 19, 2012
  6. chemistry

    Are bond energies (single and multiple bonds) applicable only to gas phase?? For instance, I can use the bond energy data to calculate for enthalpy of reaction for the formation of water: 2 H2(g) + O2(g) -> H2O(g) But I can't

    asked by Namie on September 19, 2012
  7. chemistry

    9. using bond energies, estimate the change in Hr for the following reaction. 2NO + O2--->2NO2 A 1624 kJ B -247kJ C 661 kJ D 54kJ 10. using bond energies estimate the change Hr for the follwing reaction C + 1/2O2 +1/2 N--->O=C=N a

    asked by NATIE on January 9, 2007
  8. Chemistry

    A quick question. When we use the bond energies to find delta H, should we use the sum of the bond energies of the reactants minus the sum of the bond energies of the products, or vice versa? For example, H2 + Br2 --> 2HBr Given

    asked by Steven B. on October 31, 2010
  9. science

    1.The energy associated with the absorption of a photn of wavelength 4.26 micrometers is ______________? 2.The bond energy associated with the bond between the Nitrogen atom and Bromine atom is______________________? 1. See other

    asked by Tahira on August 1, 2005
  10. chemistry

    Calculate the standard enthalpy change for the reaction OF2 (g) + H2O (l) → O2 (g) + 2HF (g). Standard enthalpies of OF2, H2O, and HF are 20 kJ mol-1, -285 kJ mol-1, and -270 kJ mol-1 respectively.

    asked by malinda on September 23, 2017

More Similar Questions