thermo notes13
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7/25/2019 Thermo Notes13
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ChE Thermo 1
Example 5.3 Calcu lat ion o f .18
Given: An Ideal Gas (CH4) undergoes an adiabatic, reversible expansion
from T1 and P1 to P2 and T2. What is T2?
T1 = 550 K
P1 = 5 bar
P2
=
1 bar
Table C.1
A 8 C o
CH4 1.702 9.08E-03 -2.16E-06
o
s*ln(T21T1)
=
A*In(T2fT1) + 8(T2 - T1) + C(T1112- T2
11
2) + D(T111-2- T211-2)
R 2.2
.1 S =
0
=
*ln(T2IT1) - R*ln(P2/P1)
T2
=
s
46.05965
J/mol-K
R= 8.314 J/mol-K
In(T21T1)
-0.290512
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7/25/2019 Thermo Notes13
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