Born - Haber Cycle Questions Energy Change In The Formation Of Ionic Compounds
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4Born - Haber Cycle Questions
Energy Change in the Formation of Ionic Compounds
1. In which pair do both compounds exhibit predominantly ionic bonding?
A) PCl
and HF
5
B) Na
SO
and BH
2
3
3
C) KI and O
3
D) NaF and H
O
2
E)
RbCl and CaO
+
+
+
+
2. When the cations Na
, K
, Rb
, Cs
are combined with chloride ion in the gas phase to
form ion pairs, which pair formation releases the greatest amount of energy?
A) NaCl
B) KCl
C) RbCl
D) CsCl
E)
All release the same amount of energy.
3. Which one of the following has an enthalpy change that is equal to the lattice energy of
BaBr
?
2
(s) Ba(s) + Br
A) BaBr
(g)
2
2
(s) Ba(g) + Br
B) BaBr
(g)
2
2
–
(s) Ba
2+
C) BaBr
(g) + 2Br
(g)
2
(s) Ba(g) + 2Br(g)
D) BaBr
2
–
(s) Ba
2+
E)
BaBr
(s) + 2Br
(g)
2
4. Which of the following statements concerning lattice energy is false?
A) Lattice energy is often defined as the energy released when an ionic solid forms
from its ions.
B) MgO has a larger lattice energy than NaF.
C) The lattice energy for a solid with 2+ and 2– ions should be two times that for a
solid with 1+ and 1– ions.
D) MgO has a larger lattice energy than LiF.
E)
All of these are true.
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