MSE 3050, Phase Diagrams and Kinetics, Leonid Zhigilei
homework #1 (page 1 out of 2)
1.
Calculate
the
molar
enthalpy
of
pu
re
i
ron
a
t
1500
K
and
one
atmosphere pressure.
The molar heats of phase
transformations for iron are:
'
H
DoJ
= 670 J/mol;
'
H
JoG
= 840 J/mol;
'
H
Go
liquid
= 13770 J/mol.
The constant pressure heat capacities
of different phases of pure iron are:
c
P
D
= 17.5 + 24.8
u
10
3
T
J/mol K
c
P
J
= 35.5
J/mol K
c
P
G
= 43.9
J/mol K
c
P
liquid
= 41.84
J/mol K
Use
the
phase
diagram
to
estimate
the
temperatures
of
phase
transformations at 1 atm (or find an accurate value in a reference book)
Plot schematically enthalpy vs temperature at one atmosphere pressure
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View Full DocumentMSE 3050, Phase Diagrams and Kinetics, Leonid Zhigilei
homework #1 (page 2 out of 2)
3. Calculate
heat
of
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 Spring '08
 Zhigilei,L
 Thermodynamics, pure iron, Leonid Zhigilei

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