38)
Using 1 mole of M feed as a basis:
1 mole M
0.8 mole M
2MD
0.1 mole D
We know the final composition because we are told 20% of M is converted to D, i.e. 0.2 mole of
M is consumed and 0.1 mole of D is produced (by stoichiometry).
Reaction equilibrium e
31)
We are given HE data for 1,2-dicholorethane(1) and dimethyl carbonate (2) at 313.15 K and 1 atm.
a) We fit the data to the expression:
HE = x1 x2 (a + bx1 + cx12)
[1]
This solution uses a spreadsheet program. We can plot HE /(x1x2) and get the best fi
28)
For a mixture of n-octanol (1) and n-decane (2):
H = x1x2(A + B (x1 x2) J/mol
where A = 12,974 + 51.505 T
and
B = 8782.8 34.129 T
with T in K.
a) Wanted: H1, H2, H1 , and H 2 .
Pure n-octanol enthalpy (x1 = 1), H 1 = H x
= 1 0 (A + B(1 0) = 0
Pure n-d
Problem Set G
Solution
10.213
Spring 2002
YT
23) A schematic of the Rankine cycle and representation on a T-S diagram:
QH
1
T
2
Boiler
2
P = 0
Wp
pump
S = 0
Wt
turbine
S = 0
P = 0
Condenser
4
1
3
4
3
QC
S
475oC
Depends on your last name.
The solution will
22)
&
Ws = ?
1
T2 = ?
P2 = 1 MPa = 10 bar
2
Compressor
= 0.82
S = ?
adiabatic
T1 = 21oC = 294 K
P1 = 200 kPa = 2 bar
We are given the information above. The unknowns are marked with ?.
General approach
1) We are given the value of =
&
(H) S Ws,rev
&
&
=
15.
a) We want to write dS in terms of changes of P and V (dS = something dP + somethang dV)
S
S
dS = dP +
dV
P V
V P
S T
S T
= dP +
dV
T V P V
T P V P
Cv
Cp
S
S
and =
=
T
T V
T P T
dS =
Cv T
Cp T
dV
dP +
T P V
T V P
b) For an i
11.
a)
SO2(g) + O2(g)
SO3(g)
Writing what we know plus data from Appendix C:
SO2(g)
O2(g)
SO3(g)
-1
-1
1
Stoich. coef.
o
-296830
0
-395720
-98890
H f298 (J/mol)
5.699
3.639
8.06
-1.278
A
0.801E-03 0.506E-03 1.056E-03 -0.251E-03
B
0
0
0
0
C
-1.015E+05 -0.
10.213 Chemical Engineering Thermodynamics
Spring 2002
Test 2 Solution
Problem 1 (35 points)
High pressure steam (stream 1) at a rate of 1000 kg/h initially at 3.5 MPa and 350 C is expanded
in a turbine to obtain work. Two exit streams leave the turbine.