Evaporation Losses of Water in Irrigation Ditch. Water at 25°C is flowing in a covered irrigation ditch below ground. Every 100 ft there is a vent line 1.0 in. inside diameter and 1.0 ft long to the outside atmosphere at 25°C. There are 10 vents in the 1000-ft ditch. The outside air can be assumed to be dry. Calculate the total evaporation loss of water in lb/d. Assume that the partial pressure of water vapor at the surface of the water is the vapor pressure, 23.76 mm Hg at 25°C. Use the diffusivity from Table 6.2-1.
Evaporation Losses of Water in Irrigation Ditch. Water at 25°C is flowing in a covered irrigation ditch below ground. Every 100 ft there is a vent line 1.0 in. inside diameter and 1.0 ft long to the outside atmosphere at 25°C. There are 10 vents in the 1000-ft ditch. The outside air can be assumed to be dry. Calculate the total evaporation loss of water in lb/d. Assume that the partial pressure of water vapor at the surface of the water is the vapor pressure, 23.76 mm Hg at 25°C. Use the diffusivity from Table 6.2-1.
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
Evaporation Losses of Water in Irrigation Ditch. Water at 25°C is flowing in a covered irrigation ditch below ground. Every 100 ft there is a vent line 1.0 in. inside diameter and 1.0 ft long to the outside atmosphere at 25°C. There are 10 vents in the 1000-ft ditch. The outside air can be assumed to be dry. Calculate the total evaporation loss of water in lb/d. Assume that the partial pressure of water vapor at the surface of the water is the vapor pressure, 23.76 mm Hg at 25°C. Use the diffusivity from Table 6.2-1.
![System
Air-NH3
Air-H₂O
Air-CO,
Air-H₂
Air-C₂H,OH
Air-CH3COOH
Air-n-hexane
Air-benzene
Air-toluene
Air-n-butanol
H₂-CH₂
H₂-N₂
H₂-benzene
H₂-Ar
H₂-NH3
H₂-SO₂
H₂-C₂H₂OH
He-Ar
He-n-butanol
He-air
He-CH,
He-N₂
He-O₂
Ar-CH4
CO₂-N₂
CO₂-0₂
N₂-n-butane
H,O–CO,
CO-N₂
CH3C1-SO₂
(C,Hs),O–NH,
Temperature
°C
0
0
25
42
3
44
0
25
42
0
21
25
25.9
0
25.9
25
25
85
38.1
22.4
25
50
67
25
150
44
25
25
25
25
25
20
25
34.3
100
30
K
273
273
298
315
276
317
273
298
315
273
294
298
298.9
273
-298.9
298
298
358
311.1
295.4
298
323
340
298
423
317
298
298
298
298
298
293
298
307.3
373
303
26.5 299.5
Diffusivity
[(m²/s)10ª
or cm²/s]
0.198
0.220
0.260
0.288
0.142
0.177
0.611
0.135
0.145
0.106
0.080
0.0962
0.086
0.0703
0.087
0.726
0.784
1.052
0.404
0.83
0.783
0.61
0.586
0.729
0.587
0.765
0.675
0.687
0.729
0.202
0.167
0.153
0.0960
0.202
0.318
0.0693
0.1078
Ref.
(W1)
(N2)
(L1)
(MI)
(H1)
(N2)
(M1)
(N2)
(C1)
(L1)
(G1)
(N2)
(C2)
(B1)
(H2)
(W2)
(B1)
(SI)
(T1)
(S2)
(S2)
HI)
(S2)
(C2)
(W3)
(W4)
(B2)
(S3)
(A1)
(C3)
(S4)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F48c34b2a-9791-450f-b343-ccf9bf1692d6%2F09e52293-4ddf-4802-8a49-ed174894a9cc%2Fgxnr88_processed.png&w=3840&q=75)
Transcribed Image Text:System
Air-NH3
Air-H₂O
Air-CO,
Air-H₂
Air-C₂H,OH
Air-CH3COOH
Air-n-hexane
Air-benzene
Air-toluene
Air-n-butanol
H₂-CH₂
H₂-N₂
H₂-benzene
H₂-Ar
H₂-NH3
H₂-SO₂
H₂-C₂H₂OH
He-Ar
He-n-butanol
He-air
He-CH,
He-N₂
He-O₂
Ar-CH4
CO₂-N₂
CO₂-0₂
N₂-n-butane
H,O–CO,
CO-N₂
CH3C1-SO₂
(C,Hs),O–NH,
Temperature
°C
0
0
25
42
3
44
0
25
42
0
21
25
25.9
0
25.9
25
25
85
38.1
22.4
25
50
67
25
150
44
25
25
25
25
25
20
25
34.3
100
30
K
273
273
298
315
276
317
273
298
315
273
294
298
298.9
273
-298.9
298
298
358
311.1
295.4
298
323
340
298
423
317
298
298
298
298
298
293
298
307.3
373
303
26.5 299.5
Diffusivity
[(m²/s)10ª
or cm²/s]
0.198
0.220
0.260
0.288
0.142
0.177
0.611
0.135
0.145
0.106
0.080
0.0962
0.086
0.0703
0.087
0.726
0.784
1.052
0.404
0.83
0.783
0.61
0.586
0.729
0.587
0.765
0.675
0.687
0.729
0.202
0.167
0.153
0.0960
0.202
0.318
0.0693
0.1078
Ref.
(W1)
(N2)
(L1)
(MI)
(H1)
(N2)
(M1)
(N2)
(C1)
(L1)
(G1)
(N2)
(C2)
(B1)
(H2)
(W2)
(B1)
(SI)
(T1)
(S2)
(S2)
HI)
(S2)
(C2)
(W3)
(W4)
(B2)
(S3)
(A1)
(C3)
(S4)
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