2338973 Energi Kisi

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ENERGI KISIDisusun oleh:

Widiyanti (4301410001)Prita Sri Sulastri (4301410017)Puji Rahayu (4301410026)

JURUSAN KIMIAFAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN

ALAMUNIVERSITAS NEGERI SEMARANG

ENERGI KISIAdalah :~ energi yang diperlukan untuk

mengubah 1 mol senyawa ionik padatan menjadi ion-ionnya dalam fasa gas

~ energi yang dilepaskan apabila ion (+) dan (-) dalam keadaan gas berubah menjadi padatan.

Persamaan Bohr-Lande

)11(πε n

r4eZANZU

0

2

Mandelung konstanta A

m C J 10 1.112ε4

m C J 10 8.854 vakumaspermitivit ε

C 10 1.602 lfundamenta tetapan e

aniondan kation muatan z and z

Avogadrobilangan N

1-21-10-0

1-21-12-0

19-

-

A

jarijarir

+

-

-

+

-

+ -

+

+

-

+

-r3 r6

r2 r5

r

n tergantung pada konfigurasi elektron ion yang bersangkutan

Harga n untuk kristal ionik selalu > 1Tabel harga n

Konfigurasi e ion n2 (He)10 (Ne)18 (Ar)36 (Kr)54 (Xe)

5791012

Contoh :Na+Cl-11Na : 1s2 2s2 2p6 3s1

Na+ : 1s2 2s2 2p6 e = 10Konfigurasi e Na+ = konf. e Ne sehingga

n Na+ = 717Cl : 1s2 2s2 2p6 3s2 2p5

Cl- : 1s2 2s2 2p6 3s2 2p6 e = 18Konfigurasi e Cl- = konf. e Ar sehingga n

Cl- = 9Jadi, n untuk NaCl = (7+9)/2 = 8

Giving its dependence on large contribution coming from nearest neighbours,the Madelung constant increases with coordination number

Structure type

A Coordination numbers

ZnS blende 1.638 4

NaCl 1.748 6

CsCl 1.763 8

Born-Mayer equation

Add

dezzN

H BAAL

000

2

14

Mandelung konstanta A

rr dpm 34.5 d

m C J 10 1.112ε4

m C J 10 8.854 vakumaspermitivit ε

C 10 1.602 lfundamenta tetapan e

aniondan kation muatan z and zAvogadrobilangan N

0

1-21-10-0

1-21-12-0

19-

BA

A

jarijarir

The use of the Born-Landé equation requires the knowledge of the structure of the compound (Madelung constant)If the structure of the compound is not known, or the Madelung constant is not available, the Kapustinskii equation can be used to calculate the lattice energy

rrrr

z z LH 5.341

510214.1

The Kapunstinskii Equation

)( -1mol kJ

sign) the (without anion and cation of charges the areandformula chemical the in ions of number the is

distance) anion - (cation radiiionic the of sum the is

z z

(pm) r

-

-

r

Born-Haber cycle

SOAL ....

Sublimation of Li

Ionization of Li

Dissociation of F2

Electron affinity of F

Formation of solid

?

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