4.) Steam undergoes an Isentropic process where it is initially at 1.30 MPa and 200 C then it expands to a pressure of 0.75 MPa, thus becoming wet steam. What is the dryness of the steam and the change in enthalpy for the process? • 100%, -2766.4 kJ/kg • 98.75, -68.94 kJ/kg • 200%, -2809.7 kJ/kg • 96.95%, -105.94 kJ/kg
4.) Steam undergoes an Isentropic process where it is initially at 1.30 MPa and 200 C then it expands to a pressure of 0.75 MPa, thus becoming wet steam. What is the dryness of the steam and the change in enthalpy for the process? • 100%, -2766.4 kJ/kg • 98.75, -68.94 kJ/kg • 200%, -2809.7 kJ/kg • 96.95%, -105.94 kJ/kg
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
Please use the values at steam table below. Choose the correct answer from the given choices
Transcribed Image Text:4.) Steam undergoes an Isentropic process where it is initially at 1.30 MPa
and 200 C then it expands to a pressure of 0.75 MPa, thus becoming wet
steam. What is the dryness of the steam and the change in enthalpy for the
process?
• 100%, -2766.4 kJ/kg
• 98.75, -68.94 kJ/kg
• 200%, -2809.7 kJ/kg
• 96.95%, -105.94 kJ/kg
1.30 (191.64)
1.35 (193.38)
P(1 Sat.)
10 v
10v
151.25 2591.0 2787.6
6.4953
145.86 2591.9 2788.8
6.4821
Sat.
143.08 255S.1 2741.1
145.60 2566.2 2755.3
148.07 2577.0 2769.5 6.4561
150.48 2587.6 2783.2 6.4858
132.84 2597.9 2796.6 6.5146
6.3935
137.06 25518 2736.8
139.53 2563.1 27513
6.3683
6.4008
175
180
185
190
195
6.4254
141.94 2574.1 2765.7 6.4320
144.30 2584.8 2779 6 6.4622
146.61 2595.3 2793.2 6.4914
155.16 2608.0 2809.7 6.5425
157.45 2617.9 2822.6 6.5696
159.70 2627.7 2835.3 6.5960
161.92 2637.3 2847.8 6.6217
164.12 2646.7 2860.1 6.6468
148.87 2605.6 2806.5
151.10 2615.6 2819.6 6.5472
153.29 2625.5 2832.4 6.5739
15545 2635.2 2845.1 6.5999
157.59 2644.8 2857.5 6.6253
6.5197
200
205
210
215
220
166.29 2656.1 2872.3 6.6713
168.43 2665.3 2884.3 6.6953
170.56 2674.4 2896.2
172.66 2683.5 2907.9
174.75 2692.4 2919.6
6.7189
6.7419
6.7645
159.70 2654.2 2869.8 6.6501
161.78 2663.5 2881.9 6.6743
163.84 2672.7 2893.9 6.6980
165.88 2681.9 2905.8
167.91 2690.9 2917.6 6.7441
225
230
235
240
245
6.7213
Internal Energy
Enthalpy
Entropy
Specific Volume
Sat
Sal.
Sat.
Vapr
Set
Liqued
hy
Set
Vapt
Sal
Vapor
Temp
Sat
Set
13id
Evap.
Evap.
Liquid
Vapor
Pres.
MP
10v,
10
Pahr
he
LIS
L1121
L1128
1.1135
255.6
252.4
249.3
246 3
2433
708.64 1866.1 2574.7
711.00 1864.2 2575.2
713.34 1862.2 2575.6
715.66 1860.3 2576.0
717.95 1858.5 2576.4
709 47 2057.0 2766 4
711.85 2055.2 2767.0
714.20 2053.4 27675
716.52 2051.6 2768.1
718.83 2049.8 2768.6
2.0200 4.6647 6.6847
2,0253 4.6549 6.6802
2.0306 4.64SI 6.6758
2.0359 4.6355 6.6714
2.0411 4.6260 6.6670
167.78
.76
.77
78
79
75
168.32
168.86
169 39
169.91
13142
170.43
170.95
171.46
171.97
172.47
L1148
L155
L.1161
L1168
L.1174
240.4
237.6
2349
2322
229.5
720.22 1856.6 2576.8
722.47 1854.7 2577.2
724.70 1852.9 2577.6
726.91 1851.I 2578.0
729.10 1849.2 2578.3
721.11 2048.0 2769.1
723.38 2046.3 2769.7
725.62 2044S 2770 2
727.83 2042.8 2770.7
730.04 2041I 2771.2
2.0462 4.6166 6.6628
2.0513 4,6073 6.6585
2.0563 4.5981 6.6544
2.0612 4.5890 6.6502
2.0662 4.5800 6.6462
s0
82
83
.84
227.0
224.5
222.0
2196
217,3
731.27 18474 2578.7
733,42 1845.7 2579.1
735.55 1843.9 2579.4
737.66 1842.1 2579.8
739.75 1840.4 2580.1
732.22 2039.4 2771.6
734.38 20377 2772.1
736.52 2036.1 2772.6
738.64 2034.4 2773.0
740.75 2032.8 2773.5
2.0710 4.571I 6.6421
2.0758 4.5623 6.6381
2.0806 45536 6.6342
2.0853 4.5450 6.6303
2.0900 4.5364 6.6264
172.96
L1181
85
.86
87
38
89
1.1187
173.94 1.1193
174.43 1.1200
173.46
174.90
1.1206
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