Chapter_10.pdf
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Chapter 10
Phase Diagram
¤ When we combine two elements...
what equilibrium state do we get?
¤ In particular, if we specify...
--a composition (e.g., wt%A - wt%B), and
--a temperature (T)
then...
How many phases do we get?
What is the composition of each phase?
How much of each phase do we get?
¼
We need a map for this !!!
Phase Diagram of H
2
O
(Example of
ONE ÓcomponentÔ
system)
Phase Diagram of H
2
O
(Example of
ONE ÓcomponentÔ
system)
Phase Diagram of ÓSugar+WaterÔ
(Example of
TWO ÓcomponentÔ
system)
100
Solubility
Limit
¤
Solubility Limit
:
Max concentration for
which only a solution
occurs without
precipitation (solid).
L
(liquid)
+
S
(solid
sugar)
80
60
L
(liquid solution
i.e., syrup)
40
20
Question:
What is the
solubility limit at 20C?
Answer:
65wt% sugar
.
If C
o
< 65wt% sugar:
sugar
If C
o
> 65wt% sugar:
syrup + sugar.
0
20
40 60
80 100
C
o
=Composition (wt% sugar)
65
(Pressure is fixed!)
¤ Solubility limit increases with T:
e.g., if T = 100C, solubility limit = 80wt% sugar.
One component phase diagram
(Do not need a concept of
composition.)
- Phase diagram of H
2
O with T and P as variables.
(Either T or P is fixed.
Typically T is fixed.)
Two component phase diagram
- Phase diagram of H & O with T and composition as variables.
- Phase diagram of H
2
& O
2
with T and composition as variables.
- Phase diagram of H
2
& O with T and composition as variables.
- Phase diagram of H & O
2
with T and composition as variables.
- Phase diagram of H
2
O & O
2
with T and composition as variables.
- Phase diagram of H
2
O & H
2
with T and composition as variables.
.
Plik z chomika:
alqemic
Inne pliki z tego folderu:
Chapter_01.pdf
(3787 KB)
Chapter_02.pdf
(1367 KB)
Chapter_03.pdf
(9244 KB)
Chapter_04.pdf
(2097 KB)
Chapter_06.pdf
(553 KB)
Inne foldery tego chomika:
callister - materials science solution manual
CRC Press - Dictionary of Material Science and High Energy Physics - D. Basu (2001) WW [16-06-2008]
EXAMS
HW Solutions
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