2-masala. 298 К da kumush iodid zolida
diffuziya koeffitsienti
1,6-1 O
'10
m
2
/s,
muhit qovushqoqligi
/7
=
10
-’ N*s/m
2
ga teng bo’lsa,
zarracha radiusini hisoblang.
Yechish: Diffuziya koeffitsientini
hisoblash uchun Eynshteyn
tenglamasidan foydalanamiz:
n RT
1
RT
D —
------------
r -
------------
N
N'6n'?jD
r = ---------
'-2-9- - ---------- JJ-= 1,36-1 O'*Ш r = l,36-10'9m
6,02-10 -6-3,14-10 -1,6-10
3-masala. Temir (III)- gidroksid gidrozoli
zarrachalarining radiusi
r=2-10
'8
m, muhit qovushqoqligi
rj
= i
0
' s N-s/m
2
bo’lsa, zarrachaning
7
=
6
s dagi o ’rtacha siljish masofasini aniqlang.
Yechish:
a x
=
formuladan foydalanamiz.
AX
=
----------- - -------- r = Vl29-10"10 «1,13-10-
\ 6 ,
02-10“ 6-3,14-103-2-10'8
y
4-masala. 298 К da konsentratsiyasi C=3 kg/m3,
zarrachasining
diametri
= s -ю
-9
m va zichligi 19,3 kg/m
3
bo’lgan
oltin gidrozolining
osmotik bosimini hisoblang.
Yechish:
Osmotik
bosimni
hisoblash
uchun
Vant-Goff
tenglamasidan foydalanamiz:
*• =—•—
m N
Bitta zarrachaning massasini uchun hajmini zichligiga ko’paytirib
topamiz.
Do'stlaringiz bilan baham: