1. 10-kg of R-134a at 300 kPa fills a rigid container whose volume is 14 L. Determine the temperature and total enthalpy in the container. The container is now heated until the pressure is 600 kPa. Determine the temperature and total enthalpy when the heating is completed. 2. 10-kg of R-134a fill a 1.348-m rigid container at an initial temperature of -40C. The container is then heated until the pressure is 200 kPa. Determine the final temperature and the initial pressure. 3. A piston-cylinder device contains 0.85 kg of refrigerant-134a at -10C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88-97.6 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15C. Determine (a) the final pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a. 4. Water is being heated in a vertical piston-cylinder device. The piston has a mass of 40 kg and a cross-sectional area of 150 cm. If the local atmospheric pressure is 100 kPa, determine the temperature at which the water starts boiling. TABLE A-11 Saturated refrigerant-134a-Temperature table Specific volume, m/kg Internal energy, kJ/kg Enthalpy, kJ/kg Entropy, kJ/kg. K Sat. Sat. Sat. Sat. Sat. Sat. Sat. Sat. Sat. Temp., press., liquid, vapor, TC Pat kPa v -34 -32 -30 84.43 -28 92.76 -26 101.73 -24 111.37 -22 121.72 -20 132.82 -18 144.69 -16 157.38 -14 170.93 -12 185.37 Vg -40 51.25 0.0007054 0.36081 -38 56.86 0.0007083 0.32732 -36 62.95 0.0007112 0.29751 69.56 0.0007142 0.27090 76.71 0.0007172 0.24711 0.0007203 0.22580 12.59 0.0007234 0.20666 15.13 0.0007265 0.18946 17.69 0.0007297 0.17395 20.25 0.0007329 0.15995 22.82 0.0007362 0.14729 25.39 0.0007396 0.13583 27.98 0.0007430 0.12542 30.57 0.0007464 0.11597 33.17 0.0007499 0.10736 35.78 liquid, U Evap., vapor, Utg Ug liquid, Evap., vapor, h hig hg liquid, Evap., vapor, SI 518 SE -10 200.74 -8 217.08 -6 234.44 -4 252.85 -2 272.36 0.0007535 0.099516 38.40 0.0007571 0.092352 41.03 0.0007608 0.085802 43.66 0.0007646 0.079804 46.31 0.0007684 0.074304 48.96 180.08 0 293.01 0.0007723 0.069255 51.63 178.53 2 314.84 0.0007763 0.064612 54.30 -176.97 4 337.90 6 362.23 8 387.88 0.0007804 0.060338 56.99 0.0007845 0.056398 59.68 0.0007887 0.052762 62.39 175.39 173.80 172.19 10 414.89 12 443.31 14 473.19 16 504.58 18 537.52 -0.036 207.40 207.37 2.475 206.04 208.51 4.992 204.67 209.66 7.517 203.29 210.81 0.000 225.86 225.86 0.00000 0.96866 0.96866 2.515 224.61 227.12 0.01072 0.95511 0.96584 5.037 223.35 228.39 0.02138 0.94176 0.96315 7.566 222.09 229.65 0.03199 0.92859 0.96058 10.05 201.91 211.96 10.10 220.81 230.91 0.04253 0.91560 0.95813 219.52 232.17 0.05301 0.90278 0.95579 218.22 233.43 0.06344 0.89012 0.95356 216.92 234.68 0.07382 0.87762 0.95144 215.59 235.92 0.08414 0.86527 0.94941 214.26 s237.17 0.09441 0.85307 0.94748 0.0007930 0.049403 65.10 0.0007975 0.046295 67.83 0.0008020 0.043417 70.57 0.0008066 0.040748 73.32 0.0008113 0.038271 76.08 200.52 213.11 12.65 199.12 214.25 15.20 197.72 215.40 17.76 196.30 216.55 20.33 194.88 217.70 22.91 193.45 218.84 25.49 192.01 219.98 28.09 190.56 221.13 30.69 189.09 222.27 33.30 187.62 223.40 35.92 186.14 224.54 38.55 184.64 225.67 41.19 183.13 226.80 43.84 181.61 227.92 46.50 229.04 49.17 212.91 238.41 0.10463 0.84101 0.94564 211.55 239.64 0.11481 0.82908 0.94389 210.18 240.87 0.12493 0.81729 0.94222 208.79 242.09 0.13501 0.80561 0.94063 207.38 243.30 0.14504 0.79406 0.93911 205.96 244.51 0.15504 0.78263 0.93766 204.52 245.72 0.16498 0.77130 0.93629 203.07 246.91 0.17489 0.76008 0.93497 201.60 248.10 0.18476 0.74896 0.93372 200.11 249.28 0.19459 0.73794 0.93253 230.16 51.86 198.60 250.45 0.20439 0.72701 0.93139 231.27 54.55 197.07 251.61 0.21415 0.71616 0.93031 232.38 57.25 195.51 252.77 0.22387 0.70540 0.92927 233.48 59.97 193.94 253.91 0.23356 0.69471 0.92828 234.58 62.69 192.35 255.04 0.24323 0.68410 0.92733 170.56 235.67 65.43 168.92 236.75 68.18 167.26 237.83 70.95 165.58 238.90 73.73 163.88 239.96 76.52 190.73 256.16 0.25286 0.67356 0.92641 189.09 257.27 0.26246 0.66308 0.92554 187.42 258.37 0.27204 0.65266 0.92470 185.73 259.46 0.28159 0.64230 0.92389 184.01 260.53 0.29112 0.63198 0.92310 TABLE A-5 Saturated water-Pressure table Specific volume, m/kg Internal energy, kJ/kg Enthalpy, kJ/kg Entropy, kJ/kg. K Sat. Sat. Sat. Sat. Sat. Sat. Sat. Sat. Sat. Press., temp., liquid, vapor, liquid, Evap., P kPa Tsat C Vi V U U18 vapor, U liquid, Evap., vapor, liquid. Evap.. vapor, hi hig hg S Sig Sg 1.0 6.97 0.001000 129.19 1.5 13.02 0.001001 87.964 2.0 17.50 0.001001 66.990 21.08 0.001002 54.242 3.0 24.08 0.001003 45.654 4.0 28.96 0.001004 34.791 10 70 5.0 7.5 32.87 0.001005 28.185 15 40.29 0.001008 19.233 45.81 0.001010 14.670 0.001010 14.670 0.001014 10.020 191.79 30 69.09 0.001022 40 75.86 0.001026 50 81.32 0.001030 53.97 20 60.06 0.001017 7.6481 251.40 25 . 64.96 0.001020 6.2034 271.93 289.24 5.2287 3.9933 317.58 340.49 3.2403 225.93 2204.6 125 150 75 100 99.61 0.001043 101.325 99.97 0.001043 105.97 0.001048 111.35 0.001053 91.76 0.001037 2.2172 384.36 1.6941 417.40 1.6734 418.95 1.3750 444.23 1.1594 466.97 2190.4 2178.5 2158.8 2142.7 2111.8 2088.2 2087.0 2068.8 2052.3 29.302 2355.2 2384.5 2392.8 54.686 2338.1 73.431 2325.5 2398.9 88.422 2315.4 2403.8 100.98 2306.9 2407.9 100.98 2293.1 2414.5 121.39 121.39 2419.8 137.75 137.75 2282.1 2261.1 168.74 2429.8 168.75 2437.2 191.81 2245.4 2448.0 225.94 2222.1 2456.0 251.42 2462.4 271.96 2467.7 289.27 2476.3 317.62 2483.2 340.54 2496.1 384.44 2505.6 417.51 2506.0 419.06 2513.0 444.36 2519.2 467.13 175 116.04 0.001057 1.0037 486.82 2037.7 200 120.21 0.001061 225 250 275 123.97 0.001064 127.41 0.001067 130.58 0.001070 300 133.52 0.001073 325 136.27 0.001076 350 375 138.86 0.001079 141.30 0.001081 400 143.61 0.001084 450 147.90 0.001088 500 151.83 0.001093 0.88578 504.50 0.79329 520.47" 0.71873 535.08 0.65732 548.57 0.60582 561.11 0.56199 572.84 0.52422 583.89 0.49133 594.32 0.46242 604.22 0.41392 622.65 0.37483 639.54 550 155.46 0.001097 0.34261 655.16 600 158.83 0.001101 650 161.98 0.001104 0.31560 669.72 0.29260 683.37 1886.1 700 164.95 0.001108 .750 167.75 0.001111 0.27278 696.23 0.25552 708.40 1875.6 1865.6 29.303 2484.4 2513.7 0.1059 8.8690 8.9749 54.688 2470.1 2524.7 0.1956 8.6314 8.8270 73.433 2459.5 2532.9 0.2606 8.4621 8.7227 88.424 2451.0 2539.4 0.3118 8.3302 8.6421 2443.9 2544.8 0.3543 8.2222 8.5765 2524.5 487.01 2024.6 2529.1 504.71 2012.7 2533.2 520.71 2001.8 2536.8 535.35 1991.6 2540.1 548.86 1982.1 2543.2 561.43 1973.1 2545.9 573.19 1964.6 2548.5 584.26 1956.6 2550.9 594.73 1948.9 2553.1 604.66 1934.5 2557.1 623.14 1921.2 2560.7 640.09 1908.8 2563.9 655.77 1897.1 2566.8 670.38 2569.4 684.08 2571.8 697.00 2574.0 709.24 2432.3 2553.7 0.4224 8.0510 8.4734 2423.0 2560.7 0.4762 7.9176 8.3938 2405.3 2574.0 0.5763 7.6738 8.2501 2392.1 2583.9 0.6492 7.4996 8.1488 2372.3 2598.3 0.7549 7.2522 8.0071 2357.5 2608.9 0.8320 7.0752 7.9073 2345.5 2617.5 0.8932 6.9370 7.8302 2335.3 2624.6 0.9441 6.8234 7.7675 2318.4 2636.1 1.0261 6.6430 7.6691 2304.7 2645.2 1.0912 6.5019 7.5931 2278.0 2662.4 1.2132 6.2426 7.4558 2257.5 2675.0 1.3028 6.0562 7.3589 2256.5 2675.6 1.3069 6.0476 7.3545 2240.6 2684.9 1.3741 5.9100 7.2841 2226.0 2693.1 1.4337 5.7894 7.2231 2213.1 2700.2 1.4850 5.6865 7.1716 2201.6 2706.3 1.5302 5.5968 7.1270 2191.0 2711.7 1.5706 5.5171 7.0877 2181.2 2716.5 1.6072 5.4453 7.0525 2172.0 2720.9 1.6408 5.3800 7.0207 2163.5 2724.9 1.6717 5.3200 6.9917 2155.4 2728.6 1.7005 5.2645 6.9650 2147.7 2732.0 1.7274 5.2128 6.9402 2140.4 2735.1 1.7526 5.1645 6.9171 2133.4 2738.1 1.7765 5.1191 6.8955 2120.3 2743.4 1.8205 5.0356 6.8561 2108.0 2748.1 1.8604 4.9603 6.8207 2096.6 2752.4 1.8970 4.8916 6.7886 2085.8 2756.2 1.9308 4.8285 6.7593 2075.5 2759.6 1.9623 4.7699 6.7322 2065.8 2762.8 1.9918 4.7153 6.7071 2056.4 2765.7 2.0195 4.6642 6.6837 TABLE A-12 Saturated refrigerant-134a-Pressure table Specific volume, m/kg Internal energy, kJ/kg Enthalpy, kJ/kg Entropy, kJ/kg. K Sat. Sat. Sat. Sat. Sat. Sat. Sat. Sat. Sat. Press., temp., liquid, vapor, liquid, Evap., vapor, PkPa Tsat C Vi V U Ufg Ug hi liquid, Evap., vapor, hig h liquid, Evap., vapor, St Sig SE 60 -36.95 0.0007098 0.31121 360 400 450 70 -33.87 0.0007144 0.26929 80 -31.13 0.0007185 0.23753 90 -28.65 0.0007223 0.21263 100 -26.37 0.0007259 0.19254 120 -22.32 0.0007324 0.16212 22.40 195.11 217.51 140 -18.77 0.0007383 0.14014 26.98 192.57 219.54 160 -15.60 0.0007437 0.12348 31.09 190.27 221.35 180 -12.73 0.0007487 0.11041 34.83 188.16 222.99 200 -10.09 0.0007533 0.099867 38.28 186.21 224.48 240 -5.38 0.0007620 0.083897 44.48 182.67 227.14 280 -1.25 0.0007699 0.072352 49.97 179.50 229.46 320 2.46 0.0007772 0.063604 54.92 176.61 231.52 5.82 0.0007841 0.056738 59.44 173.94 233.38 8.91 0.0007907 0.051201 63.62 171.45 235.07 12.46 0.0007985 0.045619 68.45 168.54 237.00 500 15.71 0.0008059 0.041118 72.93 165.82 238.75 550 18.73 0.0008130 0.037408 77.10 163.25 240.35 600 21.55 0.0008199 0.034295 81.02 160.81 241.83 650 24.20 0.0008266 0.031646 84.72 158.48 243.20 700 3.798 205.32 209.12 7.680 203.20 210.88 11.15 201.30 212.46 14.31 199.57 213.88 17.21 197.98 215.19 3.841 223.95 227.79 7.730 222.00 229.73 11.21 220.25 231.46 14.37 218.65 233.02 17.28 217.16 234.44 0.01634 0.94807 0.96441 22.49 27.08 31.21 34.97 38.43 214.48 236.97 212.08 239.16 209.90 241.11 207.90 242.86 206.03 244.46 0.03267 0.92775 0.96042 0.04711 0.90999 0.95710 0.06008 0.89419 0.95427 0.07188 0.87995 0.95183 0.09275 0.85503 0.94779 0.11087 0.83368 0.94456 0.12693 0.81496 0.94190 0.14139 0.79826 0.93965 0.15457 0.78316 0.93773 750 800 44.66 202.62 247.28 0.17794 0.75664 0.93458 50.18 199.54 249.72 0.19829 0.73381 0.93210 55.16 196.71 251.88 0.21637 0.71369 0.93006 59.72 194.08 253.81 0.23270 0.69566 0.92836 63.94 191.62 255.55 0.24761 0.67929 0.92691 68.81 188.71 257.53 0.26465 0.66069 0.92535 73.33 185.98 259.30 0.28023 0.64377 0.92400 77.54 183.38 260.92 0.29461 0.62821 0.92282 81.51 180.90 262.40 0.30799 0.61378 0.92177 85.26 178.51 263.77 0.32051 0.60030 0.92081 88.82 176.21 265.03 92.22 173.98 266.20 95.47 171.82 267.29 98.60 169.71 268.31 0.33230 0.58763 0.91994 0.34345 0.57567 0.91912 0.35404 0.56431 0.91835 0.36413 0.55349 0.91762 26.69 0.0008331 0.029361 88.24 156.24 244.48 29.06 0.0008395 0.027371 91.59 154.08 245.67 31.31 0.0008458 0.025621 94.79 152.00 246.79 850 33.45 0.0008520 0.024069 97.87 149.98 247.85 900 35.51 0.0008580 0.022683 100.83 148.01 248.85 101.61 950 37.48 0.0008641 0.021438 103.69 146.10 249.79 104.51 1000 39.37 0.0008700 0.020313 106.45 144.23 250.68 107.32 1200 46.29 0.0008934 0.016715 116.70 137.11 253.81 117.77 1400 52.40 0.0009166 0.014107 125.94 130.43 256.37 127.22 1600 57.88 0.0009400 0.012123 134.43 124.04 258.47 135.93 1800 62.87 0.0009639 0.010559 142.33 117.83 260.17 144.07 2000 67.45 0.0009886 0.009288 149.78 111.73 261.51 151.76 .2500 77.54 0.0010566 0.006936 166.99 96.47 263.45 169.63 3000 86.16 0.0011406 0.005275 183.04 80.22 263.26 186.46 167.66 269.26 0.37377 0.54315 0.91692 165.64 270.15 165.64 270.15 0.38301 0.53323 0.91624 163.67 270.99 0.39189 0.52368 0.91558 156.10 273.87 0.42441 0.48863 0.91303 148.90 276.12 0.45315 0.45734 0.91050 141.93 277.86 0.47911 0.42873 0.90784 135.11 279.17 128.33 280.09 0.52509 0.37675 0.90184 111.16 280.79 0.57531 0.31695 0.89226 92.63 279.09 0.62118 0.25776 0.87894 0.50294 0.40204 0.90498