Chemistry

posted by .

Explain why the calculated value for the (1) enthalpy of combustion for propane using bond energies (bond breaking and bond formation)might not be in close agreement to the values calculated using (2) Hess Law and the values calculated using the (3) summation of the change in enthalpies of products minus the summation the change of enthaplpies of reactions?


(1) Bond Energies Value:

(2) Hess Law Value:

(3) Summation of Enthalpies Value:

Explanation:

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    For the reaction shown below complete the following calculations. H2(g) + C2H4(g) --> C2H6(g) (a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4. (b) Calculate the enthalpy of reaction, using standard …
  2. Chemistry

    SO2 can be drawn as a molecule which satisfies the octet rule (using one double bond and a single bond) or as an expanded octet (using two double bonds). A measurement of the S-O bond distance demonstrates that the two bond lengths …
  3. chemistry

    2H2 + O2 yield 2H2O to calculate bond enthalpy, we have to take bond breaking minus bond making, how do we know which one is bond breaking and bond making
  4. chemistry-bond energies

    Octane (C8H18) is the main hydrocarbon in gasoline. Using bond energies, calculate the amount of energy produced from 2.5 kilograms of octane. I know how to do bond energies, but If someone could tell me what to do with the 2.5 kg …
  5. chemistry

    By using the bond enthalpies and bond energies in thermochemical equations to calculate the reaction enthalpy of; H + Br=2HBr
  6. chemistry

    The N-N bond energy is difficult to measure. Given the values of 190 kJ/mol for the N-Cl bond energy and 240 kJ/mol for the Cl-Cl bond energy, determine the maximum de Broglie wavelength of an electron capable of breaking the N-N bond. …
  7. chemistry

    The N-N bond energy is difficult to measure. Given the values of 190 kJ/mol for the N-Cl bond energy and 240 kJ/mol for the Cl-Cl bond energy, determine the maximum de Broglie wavelength of an electron capable of breaking the N-N bond. …
  8. chemistry

    The N-N bond energy is difficult to measure. Given the values of 190 kJ/mol for the N-Cl bond energy and 240 kJ/mol for the Cl-Cl bond energy, determine the maximum de Broglie wavelength of an electron capable of breaking the N-N bond. …
  9. physics

    Compare the slope of the velocity-time graph to the average of all your acceleration values. Are they close?
  10. Chemistry

    Calculate the average C—C bond strength in cyclopropane (in kJ/mol). Its combustion and the experimental enthalpy of reaction are: C3H6(g) + 4.5O2(g) → 3CO2(g) + 3H2O(g) ΔHºrxn = -1,957.7 kJ/mol Since all reactants and …

More Similar Questions