Pressure Conversions: Properties of Saturated Ammonia (Liquid-Vapor): Temperature Table1 bar = 0.1 MPaSpecific VolumeInternal Energy= 10² kPam³/kgkJ/kgTemp.°C-30 1.1950 1.4757-28 1.3159 1.4812-26-22-20-8-6-500.4086-43.941.4245 2.62651.4367 2.0060 -22.03-45 0.5453-40 0.71741.44931.5524-0.10-36 0.8850 1.4597 1.275717.4735.09-32 1.08321.4703 1.0561-4-20246Press.bar8101.44651.73901.9019202428Sat.LiquidUf X 10²-182.0769-161.5096 0.5739 97.36 1301.252.2644 1.5155 0.5291 106.36 1303.23-14 2.4652 1.5215 0.4885 115.37 1305.17-12 2.6798 1.5276 0.4516 124.42 1307.08-10 2.9089 1.5338 0.4180 133.50 1308.954.62704.97735.34790.96340.88031.48670.80561.4980 0.67801.50380.62333.1532 1.54003.4134 1.54643.6901 1.55283.9842 1.55944.29621.5660Sat.VaporUg32 12.38036 13.89640 15.54917.8194550 20.3311.57271.57961.58666.5890 1.60811216 7.5324 1.62318.5762 1.63869.7274 1.654710.9931.6714Sat.LiquidUF5.7395 1.5936 0.21956.15291.6008 0.20540.25140.23480.3874142.601310.78151.74 1312.570.35950.33400.3106 170.07160.88 1314.321316.040.2892 179.29 1317.7143.93 1288.6352.78 1290.8261.65 1292.9779.46 1297.1888.40 1299.230.2695 188.530.19230.16910.14920.13200.1172Sat.Sat.Sat.VaporLiquidLiquidUgh₁Sf1264.99 -43.88 1416.20 1372.32 -0.19221271.19 -21.95 1402.52 1380.57 -0.09511277.200.00 1388.56 1388.56 0.00001281.87 17.60 1377.17 1394.771286.41 35.25 1365.55 1400.811319.34197.80 1320.921322.47207.10216.421323.96225.771325.42EnthalpykJ/kg143.09152.26161.46170.69179.96Evap.hig44.10 1359.65 1403.7552.97 1353.68 1406.6661.86 1347.65 1409.5179.72 1335.36 1415.0888.68 1329.10 1417.79235.141326.82253.95 1329.48272.86 1331.94291.84 1334.191336.20 312.75310.92Sat.Vaporhg97.68 1322.77 1420.45106.70 1316.35 1423.05115.75 1309.86 1425.61124.83 1303.28 1428.11133.94 1296.61 1430.551289.86 1432.951283.02 1435.281276.10 1437.561269.08 1439.781261.97 1441.94189.26 1254.77 1444.03198.59 1247.48 1446.07207.95 1240.09 1448.04217.34 1232.61 1449.94226.75 1225.03 1451.781217.35 1453.55236.20255.18 1201.70274.26 1185.64 1459.90293.45 1169.16 1462.611152.24 1465.00EntropykJ/kg. K1.68870.1043 330.071134.87 1467.031337.97 332.171.7068 0.0930 349.32 1339.47 351.69 1117.00 1468.701.7256 0.0831 368.67 1340.70 371.35 1098.62 1469.97393.01 1341.81 396.13 1074.84 1470.96417.56 1342.42 421.17 1050.09 1471.261.75030.07251.77650.0634Sat.Vapor5g6.05235.95570.0747 5.88190.14845.81110.25720.32870.36426.1543 -500.1849 5.77670.2212 5.74305.71005.64575.61440.5734 5.43800.6077 5.41030.6418 5.38310.6759 5.35620.7097 5.32980.9099 5.17911456.87 0.9755 5.13141.0404 5.08491.1048 5.03941.1686 4.99480.7435 5.30380.7770 5.27810.8105 5.25290.8438 5.22790.8769 5.20330.3994 5.58370.4346 5.55360.4695 5.5239 -140.5043 5.4948 -120.5389 5.4662 -10Temp.°℃1.2319 4.95091.2946 4.90781.3569 4.86521.4341 4.81251.5109 4.7604-45-40-36-32-30-28-26-22-20-18-16-8-6-4-20246810260481216283236404550 Ammonia in a piston-cylinder assembly undergoes two processes in series. Initially, the ammoniais saturated vapour at P₁=1000 kPa. Process 1-2 involves cooling until the piston meets the stopswhere the position is locked in place at which time quality is x2=75%. The second process fromstate 2 to state 3, involves heating (at constant volume) until x3=100%. If the mass is 0.45 kgdetermine:a) The work for process 1-2 (in kJ).b) The heat transfer for process 1-2 (in kJ).c) The work for process 2-3 (in kJ).

Answered: Image /qna-images/answer/c7583248-04d5-4b49-9a27-d5f37e43cab6.jpg

Ammonia in a piston-cylinder assembly undergoes two processes in series. Initially, the ammonia is saturated vapour at P₁=1000 kPa. Process 1-2 involves cooling until the piston meets the stops where the position is locked in place at which time quality is x2=75%. The second process from state 2 to state 3, involves heating (at constant volume) until x3=100%. If the mass is 0.45 kg determine: a) The work for process 1-2 (in kJ). b) The heat transfer for process 1-2 (in kJ). c) The work for process 2-3 (in kJ).

Ammonia in a piston-cylinder assembly undergoes two processes in series. Initially, the ammonia is saturated vapour at P₁=1000 kPa. Process 1-2 involves cooling until the piston meets the stops where the position is locked in place at which time quality is x2=75%. The second process from state 2 to state 3, involves heating (at constant volume) until x3=100%. If the mass is 0.45 kg determine: a) The work for process 1-2 (in kJ). b) The heat transfer for process 1-2 (in kJ). c) The work for process 2-3 (in kJ).

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

Pressure Conversions: Properties of Saturated Ammonia (Liquid-Vapor): Temperature Table
1 bar = 0.1 MPa
Specific Volume
Internal Energy
= 10² kPa
m³/kg
kJ/kg
Temp.
°C
-30 1.1950 1.4757
-28 1.3159 1.4812
-26
-22
-20
-8
-6
-50
0.4086
-43.94
1.4245 2.6265
1.4367 2.0060 -22.03
-45 0.5453
-40 0.7174
1.4493
1.5524
-0.10
-36 0.8850 1.4597 1.2757
17.47
35.09
-32 1.0832
1.4703 1.0561
-4
-2
0
2
4
6
Press.
bar
8
10
1.4465
1.7390
1.9019
20
24
28
Sat.
Liquid
Uf X 10²
-18
2.0769
-16
1.5096 0.5739 97.36 1301.25
2.2644 1.5155 0.5291 106.36 1303.23
-14 2.4652 1.5215 0.4885 115.37 1305.17
-12 2.6798 1.5276 0.4516 124.42 1307.08
-10 2.9089 1.5338 0.4180 133.50 1308.95
4.6270
4.9773
5.3479
0.9634
0.8803
1.4867
0.8056
1.4980 0.6780
1.5038
0.6233
3.1532 1.5400
3.4134 1.5464
3.6901 1.5528
3.9842 1.5594
4.2962
1.5660
Sat.
Vapor
Ug
32 12.380
36 13.896
40 15.549
17.819
45
50 20.331
1.5727
1.5796
1.5866
6.5890 1.6081
12
16 7.5324 1.6231
8.5762 1.6386
9.7274 1.6547
10.993
1.6714
Sat.
Liquid
UF
5.7395 1.5936 0.2195
6.1529
1.6008 0.2054
0.2514
0.2348
0.3874
142.60
1310.78
151.74 1312.57
0.3595
0.3340
0.3106 170.07
160.88 1314.32
1316.04
0.2892 179.29 1317.71
43.93 1288.63
52.78 1290.82
61.65 1292.97
79.46 1297.18
88.40 1299.23
0.2695 188.53
0.1923
0.1691
0.1492
0.1320
0.1172
Sat.
Sat.
Sat.
Vapor
Liquid
Liquid
Ug
h₁
Sf
1264.99 -43.88 1416.20 1372.32 -0.1922
1271.19 -21.95 1402.52 1380.57 -0.0951
1277.20
0.00 1388.56 1388.56 0.0000
1281.87 17.60 1377.17 1394.77
1286.41 35.25 1365.55 1400.81
1319.34
197.80 1320.92
1322.47
207.10
216.42
1323.96
225.77
1325.42
Enthalpy
kJ/kg
143.09
152.26
161.46
170.69
179.96
Evap.
hig
44.10 1359.65 1403.75
52.97 1353.68 1406.66
61.86 1347.65 1409.51
79.72 1335.36 1415.08
88.68 1329.10 1417.79
235.14
1326.82
253.95 1329.48
272.86 1331.94
291.84 1334.19
1336.20 312.75
310.92
Sat.
Vapor
hg
97.68 1322.77 1420.45
106.70 1316.35 1423.05
115.75 1309.86 1425.61
124.83 1303.28 1428.11
133.94 1296.61 1430.55
1289.86 1432.95
1283.02 1435.28
1276.10 1437.56
1269.08 1439.78
1261.97 1441.94
189.26 1254.77 1444.03
198.59 1247.48 1446.07
207.95 1240.09 1448.04
217.34 1232.61 1449.94
226.75 1225.03 1451.78
1217.35 1453.55
236.20
255.18 1201.70
274.26 1185.64 1459.90
293.45 1169.16 1462.61
1152.24 1465.00
Entropy
kJ/kg. K
1.6887
0.1043 330.07
1134.87 1467.03
1337.97 332.17
1.7068 0.0930 349.32 1339.47 351.69 1117.00 1468.70
1.7256 0.0831 368.67 1340.70 371.35 1098.62 1469.97
393.01 1341.81 396.13 1074.84 1470.96
417.56 1342.42 421.17 1050.09 1471.26
1.7503
0.0725
1.7765
0.0634
Sat.
Vapor
5g
6.0523
5.9557
0.0747 5.8819
0.1484
5.8111
0.2572
0.3287
0.3642
6.1543 -50
0.1849 5.7767
0.2212 5.7430
5.7100
5.6457
5.6144
0.5734 5.4380
0.6077 5.4103
0.6418 5.3831
0.6759 5.3562
0.7097 5.3298
0.9099 5.1791
1456.87 0.9755 5.1314
1.0404 5.0849
1.1048 5.0394
1.1686 4.9948
0.7435 5.3038
0.7770 5.2781
0.8105 5.2529
0.8438 5.2279
0.8769 5.2033
0.3994 5.5837
0.4346 5.5536
0.4695 5.5239 -14
0.5043 5.4948 -12
0.5389 5.4662 -10
Temp.
°℃
1.2319 4.9509
1.2946 4.9078
1.3569 4.8652
1.4341 4.8125
1.5109 4.7604
-45
-40
-36
-32
-30
-28
-26
-22
-20
-18
-16
-8
-6
-4
-2
0
2
4
6
8
10
26048
12
16
28
32
36
40
45
50

Ammonia in a piston-cylinder assembly undergoes two processes in series. Initially, the ammonia
is saturated vapour at P₁=1000 kPa. Process 1-2 involves cooling until the piston meets the stops
where the position is locked in place at which time quality is x2=75%. The second process from
state 2 to state 3, involves heating (at constant volume) until x3=100%. If the mass is 0.45 kg
determine:
a) The work for process 1-2 (in kJ).
b) The heat transfer for process 1-2 (in kJ).
c) The work for process 2-3 (in kJ).

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2. A piston-cylinder assembly with stops (see figure) contains 1.54 kg of water initially occupying a volume of 1.25 m at a pressure of 1 bar (State 1). As the water in the assembly is heated, the pressure and temperature in the system remain constant until the piston contacts the stops. In this position (State 2), the quality, x2, is determined to be 92%. Heat continues to be added to the system at a constant volume until the system reaches a pressure of 1.5 bar (State 3). Determine the following quantities: а. X b. V2 (m2) C. W13 (kJ) d. Qu (kJ) e. Plot the results on a P-v diagram, labelling relevant P, T, and v values.
Ammonia in a piston-cylinder assembly undergoes two processes in series. Initially, the ammonia is saturated vapour at P₁=1000 kPa. Process 1-2 involves cooling until the piston meets the stops where the position is locked in place at which time quality is x2=75%. The second process from state 2 to state 3, involves heating (at constant volume) until x3=100%. If the mass is 0.45 kg determine: The work for process 2-3 (in kJ). The heat transfer for process 2-3 (in kJ). Sketch the processes on a p-v diagram, what does the area under the curve represent?
An ideal gas initially occupying 0.020 m3 at 1.0 MPa is quasistatically expanded inside a piston-cylinder device at a constant pressure until its volume doubles. Next the expansion is continued at constant volume till the pressure reaches half of the initial pressure. Finally it is brought back to the initial state in a polytropic process with exponent n=1.6 a) Draw the processes on a P-v diagram and calculate the total work. b) Calculate the total heat transfered, what is the difference between the initial and final temperature?
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