Using the data given below, estimate the enthalpy added to 1 kg of water that undergoes the following transformations: (a) from 0 °C to 90 °C at p = 105 Pa; (b) from 95 °C to 105 °C at p = 105 Pa; (hint: combine enthalpy of vaporization and enthalpy change as a result of heating for 10 °C, which can be based on enthalpy change for every 10 °C for liquid water) (c) from 95 °C to 105 °C at p = 1.2 ´105 Pa (similar to 2, but a different pressure condition).
Using the data given below, estimate the enthalpy added to 1 kg of water that undergoes the following transformations: (a) from 0 °C to 90 °C at p = 105 Pa; (b) from 95 °C to 105 °C at p = 105 Pa; (hint: combine enthalpy of vaporization and enthalpy change as a result of heating for 10 °C, which can be based on enthalpy change for every 10 °C for liquid water) (c) from 95 °C to 105 °C at p = 1.2 ´105 Pa (similar to 2, but a different pressure condition).
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
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Question
Using the data given below, estimate the enthalpy added to 1 kg of water that undergoes the following transformations:
(a) from 0 °C to 90 °C at p = 105 Pa;
(b) from 95 °C to 105 °C at p = 105 Pa; (hint: combine enthalpy of vaporization and enthalpy change as a result of heating for 10 °C, which can be based on enthalpy change for every 10 °C for liquid water)
(c) from 95 °C to 105 °C at p = 1.2 ´105 Pa (similar to 2, but a different pressure condition).
![Table 12.1 Section of a steam table: thermodynamic properties for water at specified temperatures and pressures. See
text for more description. The thermodynamic information summarized in steam tables can be found on-line in convenient
calculators and apps. Adapted from [64].
p(Tsat)
1 x 10° Pa (99.61 °C)
1.2 x 10 Pa (104.78 °C)
Temp
(°C]
h
[m³/kg]
[kJ/kg]
[kJ/kg] [kJ/kg K]
[m³/kg]
[kJ/kg] [kJ/kg] [kJ/kg K]
Sat. Liq. 1.0432 x 10-3
Evap.
Sat. Vap.
417.40
2088.2
2505.6
417.40
2257.4
2674.9
1.3028
6.0560
7.3588
1.0473 x 10-3
1.4274
439.23
2072.5
2511.7
1.6929
1.6939
439.36
2243.7
1.3609
5.9368
7.2977
1.4284
2683.1
1.0002 x 10-3 -0.0404 0.0597 -0.0001
1.0003 x 10-3
1.0018 x 10-3
1.0001 x 10-3 -0.0400 0.0800
1.0003 x 10-3 42.017
1.0018 x 10-3 83.905
1.0044 x 10-3
1.0078 x 10-3
1.0121 x 10-3 209.31 209.43
1.0171 x 10-3 251.15
1.0227 x 10-3
1.0290 x 10-3 334.95 335.07
0.00
-0.0001
10
42.018
42.118
0.1511
42.137
0.1511
20
83.906
84.006
0.2965
84.025
0.2965
1.0044 x 10-3
1.0078 x 10-3
1.0121 x 10-3
1.0171 x 10-3
1.0227 x 10-3
1.0290 x 10-3
30
125.72
125.82
0.4367
125.72
125.84
0.4367
40
167.51
167.62
0.5724
167.51
167.63
0.5724
50
209.32
209.42
0.7038
0.7038
60
251.15
251.25
0.8313
251.26
0.8312
70
293.02
293.12
0.9551
293.02
293.14
0.9551
80
334.94
335.05
1.0755
1.0755
90
1.0359 x 10-3
376.96
377.06
1.1928
1.0359 x 10-3
376.95 377.08
1.1928
1.0435 x10-3
419.05
1.3072
100
1.6959
2506.2
2675.8
7.3610
419.18
120
1.7932
2537.3
2716.6
7.4678
1.4906
2535.7
2714.6
7.3794
140
1.8891
2567.8
2756.7
7.5672
1.5712
2566.5
2755,1
7.4800
160
1.9841
2598.0
2796.4
7.6610
1.6508
2597.0
2795.1
7.5745
180
2.0785
2628.1
2836.0
7.7503
1.7299
2627.3
2834.9
7.6643
200
2.1724
2658.2
2875.5
7.8356
1.8085
2657.5
2874.5
7.7499
220
2.2661
2688.4
2915.0
7.9174
1.8867
2687.8
2914.2
7.8320](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8c976ffd-2b64-4a6c-9add-785e953a9e13%2Fa2d28963-984b-43cc-9fd4-557115bafbcc%2Fiyfdf8j_processed.png&w=3840&q=75)
Transcribed Image Text:Table 12.1 Section of a steam table: thermodynamic properties for water at specified temperatures and pressures. See
text for more description. The thermodynamic information summarized in steam tables can be found on-line in convenient
calculators and apps. Adapted from [64].
p(Tsat)
1 x 10° Pa (99.61 °C)
1.2 x 10 Pa (104.78 °C)
Temp
(°C]
h
[m³/kg]
[kJ/kg]
[kJ/kg] [kJ/kg K]
[m³/kg]
[kJ/kg] [kJ/kg] [kJ/kg K]
Sat. Liq. 1.0432 x 10-3
Evap.
Sat. Vap.
417.40
2088.2
2505.6
417.40
2257.4
2674.9
1.3028
6.0560
7.3588
1.0473 x 10-3
1.4274
439.23
2072.5
2511.7
1.6929
1.6939
439.36
2243.7
1.3609
5.9368
7.2977
1.4284
2683.1
1.0002 x 10-3 -0.0404 0.0597 -0.0001
1.0003 x 10-3
1.0018 x 10-3
1.0001 x 10-3 -0.0400 0.0800
1.0003 x 10-3 42.017
1.0018 x 10-3 83.905
1.0044 x 10-3
1.0078 x 10-3
1.0121 x 10-3 209.31 209.43
1.0171 x 10-3 251.15
1.0227 x 10-3
1.0290 x 10-3 334.95 335.07
0.00
-0.0001
10
42.018
42.118
0.1511
42.137
0.1511
20
83.906
84.006
0.2965
84.025
0.2965
1.0044 x 10-3
1.0078 x 10-3
1.0121 x 10-3
1.0171 x 10-3
1.0227 x 10-3
1.0290 x 10-3
30
125.72
125.82
0.4367
125.72
125.84
0.4367
40
167.51
167.62
0.5724
167.51
167.63
0.5724
50
209.32
209.42
0.7038
0.7038
60
251.15
251.25
0.8313
251.26
0.8312
70
293.02
293.12
0.9551
293.02
293.14
0.9551
80
334.94
335.05
1.0755
1.0755
90
1.0359 x 10-3
376.96
377.06
1.1928
1.0359 x 10-3
376.95 377.08
1.1928
1.0435 x10-3
419.05
1.3072
100
1.6959
2506.2
2675.8
7.3610
419.18
120
1.7932
2537.3
2716.6
7.4678
1.4906
2535.7
2714.6
7.3794
140
1.8891
2567.8
2756.7
7.5672
1.5712
2566.5
2755,1
7.4800
160
1.9841
2598.0
2796.4
7.6610
1.6508
2597.0
2795.1
7.5745
180
2.0785
2628.1
2836.0
7.7503
1.7299
2627.3
2834.9
7.6643
200
2.1724
2658.2
2875.5
7.8356
1.8085
2657.5
2874.5
7.7499
220
2.2661
2688.4
2915.0
7.9174
1.8867
2687.8
2914.2
7.8320
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