Chemistry

posted by .

Consider the isomerization equlibria of an alkene (C4H8) that co-exists as three isomers.

(These 3 are in an equlibrium triangle)
Reaction 1: cis-2-butene ⇔ trans-2-butene
Reaction 2: cis-2-butene ⇔ 2-methylpropene
Reaction 3: trans-2-butene ⇔ 2-methylpropene

Known values at 300k are known:
cis-2-butene: standard G of formation = 66kJ/mol
Standard enthalpy of formation = -7.0kJ/mol

trans-2-butene: standard G of formation = 63kJ/mol
Standard enthalpy of formation = -11.2kJ/mol

2-methylpropene: standard G of formation =58.0kJ/mol
Standard enthalpy of formation = not know

The temperature of the above system is raised to 400K and equilibrium is re-established. The mole percentage of trans-2-butene at the new equilibrium is determined to be 18%. Calculate the enthalpy of formation and the entropy of formation for reaction 2 and 3.

Thanks

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. convert cis-2-butene and trans-2-butene

    why can't you convert cis-2-butene into trans-2-butene simply by undergoing a rotation?
  2. organic chemistry

    why can't you convert cis-2-butene into trans-2-butene simply by undergoing a rotation/ The cis and trans isomers of 2-butene involve a pi bond as well as a sigma bond. To "rotate" the molecule, the pi bond must be broken (remember …
  3. chemistry

    Which of the compounds below exhibit geometric isomerism (cis-, trans-)?
  4. chem

    The average bond enthalpy for a C=C double bond is 614kj/mol and that of a C-C single bond is 348kj/mol . Estimate the energy needed to break the pi bond in 2-butene. CH3 CH3 CH3 H \ / \ / C=C ------> C=C / \ / \ H H H CH3 Cis-2-butene …
  5. Organic Chemistry

    Which of the following products of the acid-catalyzed elimination of 2-pentanol is the Hoffmann elimination product?
  6. Chemistry

    Which of these names are incorrect? 1-butene 2-butene 3-butene I don't know why any of these would be incorrect. Can you explain please?
  7. chemistry

    why does 2-butene have cis and trans isomers but 1-butene doesn't?
  8. Chemistry

    1. How would you sketch the probable products of the reaction of the cis and trans with each reagent other than AgNO3?
  9. organic chemisrty

    between butane,cis-2-butane,2-butyne,ethane and trans-2-butene which one has higher melting
  10. Chemistry

    The equilibrium constant, Kp, equals 3.40 for the isomerization reaction: cis-2-butene trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene, what is the equilibrium pressure of each …

More Similar Questions