chemistry

posted by .

7. (a) Determine the crystal lattice energy for LiF(s) given that the ∆Hsubl for Li = 155kJ/mol,
∆H0f for F(g) = 78.99kJ/mol, IE1 of Li = 520kJ/mol, EA for Fluorine = -322kJ/mol and the ∆H0f LiF(s) = -589.5kJ/mol
(b) For the following reactions:
NH4NO3(s) + H2O(l) ¨ NH4+(aq) + NO3-(aq). Given that
∆H0f of NO3- = ∆H0f = 205.0kJ/mol, and S0 = 146J/mol .k,
∆H0 f of NH4+ = -132.57kJ/mol, and S0 = 113.4 J/mol .k,
∆H0 f of NH4NO3 = -365.56kJ/mol, and S0 = 151.08 J/mol .k

  • chemistry -

    DHsubl + IP + DHF + EA(negative) + U = -589.5
    Solve for U.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    A sample of 1.00 mol H2O(g) is condensed isothermally and reversibly to liquid water at 100°C. The standard enthalpy of vaporization of water at 100°C is 40.656 kJ mol−1. Find w, q, ∆U, and ∆H for this process. …
  2. chemistry

    Calculate the heat of formation of water from its constituent elements from the following information: 3 H2 (g) + O3 (g) ¨ 3H2O ∆H = ?
  3. Chemistry

    ∆H⁰rxn, for the reaction of Ca(s) + 2H+(aq) -> Ca2+(aq) + H2(g) is -544 kJ/mol. ∆H⁰rxn, for the reaction of CaO(s) + 2H+(aq) -> Ca2+(aq) + H2O(l) is -193 kJ/mol. Based on these results, what is the ∆Hf …
  4. Chemistry

    Calculate ∆H˚ for the following reaction using the given bond dissociation energies. CH4 (g) + 2O2 (g) --> CO2 (g) + 2H2O (g) Bond.......∆H˚ (kJ/mol) O-O........142 H-O.........459 C-H.........411 C=O........799 …
  5. Chemistry

    Consider the reaction PCl3(ℓ) → PCl3(g) at 298 K. If ∆H◦ is 32.5 kJ/mol, ∆S ◦ is 93.3 J/K mol, and ∆G ◦ is 4.7 kJ/mol, what would be the boiling point of PCl3 at one atmosphere?
  6. Chemistry

    Given that ∆Hº(Br(g)) = 111.9 kJ/mol ∆Hº(C(g)) = 716.7 kJ/mol ∆Hº(CBr4(g)) = 29.4 kJ/mol calculate the average molar bond enthalpy of the carbon-bromine bond in a CBr4 molecule.
  7. chemistry

    Calculate the temperature (K) at which the equation as written is at equilibrium. Express your answer to three significant figures. CaO(s) + CO2(g) → CaCO3(s) ∆G°f (kJ/mol) CaO(s)-604.0 CO2(g)-394.4 CaCO3(s)-1128.8 ∆H°f …
  8. AP Chemistry

    Calculate ∆G0 for the following reaction. 4XY + 3Z2−→2Z3X2+ 2Y2 Substance ∆H0f S0kJ/mol J/mol·K XY 205.0 75.0 Y2 −82.0 37.0 Z2 −25.0 78.0 Z3X2 −245.0 137.0 Answer in units of kJ/mol
  9. chemistry

    The equations for the heats of the formation of copper (I) oxide,Cu2O and copper(II) oxide,CuO are: 2Cu(s) +1/2 O2(g) CuO(s); ∆Hof =-166.7kj/mol Cu(s) +1/2 O(g) CuO(s); ∆Hof= -155.2kj/mol The first and second ionisation …
  10. AP Chemistry

    DrBob222 PLEASE HELP Hf of CO2 = -393.5 kJ/mol Hf of H2O = -285.8 kJ/mol The combustion reaction for benzoic acid C6H5CO2H(s) + 15/2 O2(g) → 7 CO2(g) + 3 H2O(ℓ) has ∆H0 = −3226.7 kJ/mole. Use Hess’s Law to …

More Similar Questions