:
261 .. 31.01.2017
:
..
- 2016
4, 25, 40, 55, 75, 90, 110, 125, 152, 160, 173, 189, 198, 213, 228, 243, 258, 283, 298, 313. |
4. 5000 11600, 6,55 2,2?
:
t1 = 500 0C
t2 = 1160 0C
D1 = 6,55
D2 = 2,2
Nt1=? Nt2=?
500 0:
M(SN) = DN2∙M(N2);
M(SN) = 6,55∙28 = 183,4 /
1160 0:
M(SN) = DN2∙M(N2);
M(SN) = 2,2∙28 = 61,6 /
: S6 S2
25. : Na2O, SO3, CaO, P2O5. ? .
:
Na2O + H2O →2NaOH ( , )
SO3 + H2O →2SO4 ( , )
CaO + H2O → a(OH)2 ( , )
P2O5 + 3H2O → 2H3PO4 ( , )
40. , :
Ba → BaO → Ba(OH)2
↓
Ba(OH)2 → BaO
:
2Ba + O2 → 2BaO
BaO + H2O → Ba(OH)2
Ba + 2H2O → Ba(OH)2 + H2↑
Ba(OH)2 → BaO + H2O ( 780-800 0C)
55. , : ) 3d; ) 4p; ) 2s. , .
:
a)
21Sc 1s22s22p63s23p63d14s2
)
31Ga 1s22s22p63s23p63d104s24p1
)
3Li 1s22s1
75. : Ca+2, C+4
:
20Ca0 1s22s22p63s23p64s2
Ca2+ 1s22s22p63s23p6
( 2 18, )
2+
4+ 1s2
90. 1 . ?
:
( ) ( ) , .
d-: , , (- ), ( ) ( ). . , :
Cu+ Ag+ Au+
0,98 1,13 1,37
, . . - . , , , , , .
|
|
. , , , , ( ) . .
ns1. , . ( ) . +, .
.
:
F Cl VII , ns2np5. , 2 : s- p-, , d-:
, , 1. 3d-, 3,5,7:
125. BeBr2 POCl3. .
:
. Be 2s- 2p-:
, . ( Be), . s- p-, sp. 1800, BeBr2 .
POCl3 () P, : [Ne]3s23p3. 5 4 , sp3, 4 (4 . ). POCl3 .
POCl3 .
152. 25 24 . .
|
|
:
C2H4() + H2O() = C2H5OH()
:
ΔH0.. = ΣΔH0∙ni - Σ ΔH0∙ni
ΔH0.. = ΔH0(C2H5OH()) - [ΔH0(C2H4()) + ΔH0(H2O()) = -235,31 (52,28 241,83) = - 46,06
: : C2H4() + H2O() = C2H5OH(); ΔH0= - 46,06