2. The questions which follow, are based on equations used in the construction of the Born- Haber cycle for the ionic compound MgO (s) a) Write the missing equations representing the enthalpy changes given. AH/kJ Heat of formation of MgO - 602 Heat of atomization of magnesium +148 First ionization energy of magnesium +738 Mg (g) Mg (g) + e" Second ionization of magnesium +1451 Heat of atomization of oxygen +249 First electron affinity of oxygen - 141 Second electron affinity of oxygen Og) + e +791 Lattice energy of MgO b) Selenium is below oxygen in Group VI of the periodic table. Suggest with a reason whether you would expect MgSe to have a higher or lower lattice energy than MgO. c) Sketch the Born-Haber cycle for MgO.

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2. The questions which follow, are based on equations used in the construction of the Born-
Haber cycle for the ionic compound MgO (s)
a) Write the missing equations representing the enthalpy changes given.
ΔΗ/ J
Heat of formation of MgO
- 602
Heat of atomization of magnesium
+148
First ionization energy of magnesium
+738
Mg (g)
Mg* (g) + e
Second ionization of magnesium
+1451
Heat of atomization of oxygen
+249
First electron affinity of oxygen
- 141
Second electron affinity of oxygen
+791
O(g) + e
Lattice energy of MgO
b) Selenium is below oxygen in Group VI of the periodic table. Suggest with a reason
whether you would expect MgSe to have a higher or lower lattice energy than MgO.
7
c) Sketch the Born-Haber cycle for MgO.
Transcribed Image Text:2. The questions which follow, are based on equations used in the construction of the Born- Haber cycle for the ionic compound MgO (s) a) Write the missing equations representing the enthalpy changes given. ΔΗ/ J Heat of formation of MgO - 602 Heat of atomization of magnesium +148 First ionization energy of magnesium +738 Mg (g) Mg* (g) + e Second ionization of magnesium +1451 Heat of atomization of oxygen +249 First electron affinity of oxygen - 141 Second electron affinity of oxygen +791 O(g) + e Lattice energy of MgO b) Selenium is below oxygen in Group VI of the periodic table. Suggest with a reason whether you would expect MgSe to have a higher or lower lattice energy than MgO. 7 c) Sketch the Born-Haber cycle for MgO.
d) Calculate the Lattice energy of MgO.
Transcribed Image Text:d) Calculate the Lattice energy of MgO.
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