BORNHABER CYCLES

1
BORN-HABER CYCLES
R W Grime Ripon Grammar School
2
NaCl
Na (g) e- Cl (g)
?H formation
3
Na (g) e- Cl (g)
?H formation
Ionic compound (s)
4
Na (g) e- Cl (g)
Elements (std states)
?H formation
Ionic compound (s)
5
Na (g) e- Cl (g)
Elements (std states)
?H formation
Ionic compound (s)
6
Metal ions, e-s, non-metal atoms (g)
Elements (std states)
?H formation
Ionic compound (s)
7
Metal ions, e-s, non-metal atoms (g)
Gas ions (g)
Elements (std states)
?H formation
Ionic compound (s)
8
Metal ions, e-s, non-metal atoms (g)
Gas ions (g)
Elements (std states)
?H formation
Ionic compound (s)
?Hformation sum of all other ?Hs
9
NaCl
Na (g) e- Cl (g)
494
364
109 121
771
?H formation
?
?Hformation 109 121 494 364 771
411 kJmol-1
10
MgCl2
Mg2 (g) 2 e- 2 Cl (g)
736 1450
2(364)
150 2(121)
?
?H formation
642
642 150 2(121) 736 1450 2(364)
?Hlattice ?Hlattice 642 150 2(121) 736
1450 2 (364) 2492 kJ mol-1
11
KCl
K (g) e- Cl (g)
418
364
90 121
710
?H formation
?
?Hformation 90 121 418 364 710
445 kJ mol-1
12
CaBr2
Ca2 (g) 2 e- 2 Br (g)
590 1150
2(342)
193 2(112)
2125
?H formation
?
?Hformation 193 2(112) 590 1150 2(342)
2125 652 kJ mol-1
13
Al2O3
2 Al3 (g) 6 e- 3 O (g)
2(577) 2(1820) 2(2740)
3(142) 3(844)
2(314) 3(248)
?
?H formation
1669
1669 2(314) 3(248) 2(577) 2(1820)
2(2740) 3(-142) 3(844) ?H ?H 1669
2(314) 3(248) 2(577) 2(1820) 2(2740)
3(142) 3(844) 15421 kJ mol-1
14
CaO
Ca2 (g) 2 e- O (g)
590 1150
142 844
193 248
?
?H formation
635
635 193 248 590 1150 142 844
?Hlattice ?Hlattice 635 193 248 590
1150 142 844 3518 kJ mol-1
15
CaI2
Ca2 (g) 2 e- 2 I (g)
590 1150
2X
193 2(107)
2054
?H formation
535
535 193 2(107) 590 1150 2X
2054 2X 535 193 2(107) 590 1150
2054 2X - 628 X 314 kJ mol-1
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CuO
Cu2 (g) 2 e- O (g)
745 1960
142 844
X 248
4149
?H formation
155
155 X 248 745 1960 142 844
4149 X 155 248 745 1960 142 844
4149 339 kJ mol-1
17
CoCl
Co (g) e- Cl (g)
757
364
427 121
700
?H formation
?
?Hformation 427 121 757 364 700
241 kJ mol-1
18
CoCl2
Co2 (g) 2 e- 2 Cl (g)
757 1640
2(364)
427 2(121)
2624
?H formation
?
?Hformation 427 2(121) 757 1640 2(364)
2624 286 kJ mol-1
19
CoCl3
Co3 (g) 3 e- 2 Cl (g)
757 1640 3230
3(364)
427 3(121)
5350
?H formation
?
?Hformation 427 3(121) 757 1640 3230
3(364) 5350 25 kJ mol-1