# chemistry

posted by .

calculate the lattice energy of sodium oxide (Na2O) from the following data:

Ionization energy of Na(g): 495 kJ/mol

Electron affinity of O2 for 2e: 603 kJ/mol

Energy to vaporize Na(s): 109 kJ/mol

O2(g) bond energy: 499 kJ/mol

Energy change for the reaction 2Na(s)+ 1/2 O2(g)--> Na2O(s): -416 kJ/mol

• chemistry -

2Na(s) ==> 2Na(g) dHsub = 109*2 = ?
2Na(g) ==> 2Na^ + 2e IP = 495*2 = ?
O2(g) ==> 2O(g) B.E. = 499*1/2 = ?
O + 2e ==> O^2- EA = -603 = ?
2Na^+(g) + O^2-(g) ==> Na2O(s) Ecrystal
------------------------------------
2Na(s) + 1/2O2(g) ==> Na2O(s) = -416
Hf = 416
-416=dHsub + IP + BE + EA(-) + Ecrystal
Solve for Ecrystal.

• chemistry -

1170

• chemistry -

-2477

## Similar Questions

1. ### Chemistry

What is the lattice energy of NaH? Use the given information below: Heat of formation for NaH = -56.442 kJ/mol Head of sublimation for Na = 107.3 kJ/mol Ionization energy for Na = 496.00 kJ/mol Bond dissociation energy for H2 = 435.9kJ/mol
2. ### Chemistry

What is the lattice energy of NaH? Use the given information below: Heat of formation for NaH = -56.442 kJ/mol Head of sublimation for Na = 107.3 kJ/mol Ionization energy for Na = 496.00 kJ/mol Bond dissociation energy for H2 = 435.9kJ/mol
3. ### chemistry

What is the lattice energy of NaBr? heat of formation of NaBr = -362 kJ/mol heat of sublimation for Na = 107.30 kJ/mol ionization energy for Na = 496 kJ/mol bond dissociation energy for Br2 = 190 kJ/mol electron affinity of Br = -325

Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity …

Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity …
6. ### chemistry

Can someone help me to check my answer and the way I solve this problem is right or wrong?
7. ### Chemistry

What is the lattice energy of NaI? Use the given information below. Heat of formation for NaI = -288.0 kJ/mol Heat of sublimation for Na = 107.3 kJ/mol Ionization energy for Na = 496.0 kJ/mol Bond dissociation energy for I2 = 149 kJ/mol
8. ### Chemistry

Use an enthalpy diagram to calculate the lattice energy of CaCl2 from the following information. Energy needed to vaporize one mole of Ca(s) is 192 kJ. For calcium, the first IE = 589.5 kJ mol-1, the second IE = 1146 kJ mol-1. The …
9. ### Chemistry

Consider the following data. DeltaHf (Na2O (s))=-414kJ/mol Delta H sublimation(Na)=109 kJ/mol I.E. (Na)=495 kJ/mol Bond Energy (O2) = 495 kJ/mol E.A. (O) = -141 kJ/mol E.A. (O -) = 878 kJ/mol Use this information to calculate the lattice …
10. ### chemistry

The enthalpy of formation of MX is ΔHf° = –493 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 143 kJ/mol. The ionization energy of M is IE = 437 kJ/mol. The electron affinity of X is ΔHEA = –317 kJ/mol. (Refer …

More Similar Questions