college chemistry-thermochemistry

posted by .

i have one more question:
I know this one has to do with hess's law but i'm not sure of how to get the enthalpy of vaporization from this?

Clculate the enthalpy of vaporization of solid potassium bromide to a gas of ions, the process KBr--->K{+1}(g)+Br{-1}(g), from the following information and the enthalpy of formation of KBr(s), which is -394kJ/mol

Atomization of K: K(s)--->K(g) delta H given
Ionization of K: K(g)--> K{+1}(g)+ e(g) delta H given

VAporization of bromine: Br2(l)-->Br2(g) delta H given

Dissociation of bromine: Br2(g)-->2Br(g) delta H given

Electron attachment of bromine: Br(g)+e--->Br{-1}(g) delta H given

  • college chemistry-thermochemistry -

    I just posted it at the original spot below.

  • college chemistry-thermochemistry -

    thanx so much!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Hess' law

    Which of the following is the best definition of Hess' Law?
  2. Chemistry

    Which of the following is the best definition of Hess' Law?
  3. Chemistry

    Which of the following is the best definition of Hess' Law?
  4. 12 Chemistry

    What is the molar enthalpy of combustion of magnesium?
  5. chemsitry

    c. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following values: The standard enthalpy of formation of …
  6. chemistry-Thermochemistry (grade 12)

    calculate enthalpy of H for the reaction N2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) + 2H2O(l) Enthalpy of H = -6.22.2 kJ H2(g) + (1/2)O2(g) -> H2O(l) enthalpy of H = -285.8 kJ/mol H2(g) …
  7. chemistry-Thermochemistry (grade 12)

    calculate enthalpy of H for the reaction N2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) + 2H2O(l) Enthalpy of H = -6.22.2 kJ H2(g) + (1/2)O2(g) -> H2O(l) enthalpy of H = -285.8 kJ/mol H2(g) …
  8. Chemistry

    The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram.
  9. chemistry

    The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram. b. The molar enthalpy of fusion for water is 6.009 kJ/mol. Express this enthalpy of fusion in joules per gram.
  10. Chemistry

    Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2 - Enthalpy is 160.9 kj H2 + 1/2O2 = H2O - Enthalpy is -285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3 - Enthalpy is 288.6 I try using Hess Law …

More Similar Questions