饱和蒸汽热焓值表

附表18（续）焓值计算公式i=u + APV i焓值 u内能（单位千卡/公斤）A 功的当量值（=1/426.9千卡/千克.米）P压力（千克/平方米kgf/m2）V比容（m3/kg）/00.00100000.46-0.00010.00099970.97-0.0001100.001000142.490.15100.000999942.980.1509200.001001684.330.29620.001001484.800.2961400.0010077167.940.57210.0010074168.380.5719600.0010169251.560.83100.0010167251.980.8307800.0010288335.291.07500.0010286335.691.07471000.0010432419.361.30660.0010430419.741.30621200.0010601503.971.52750.0010599504.321.52701400.0010796589.301.73920.0010783589.621.73861600.383582767.26.86470.0011017675.841.94241800.404502811.76.96510.194432777.96.58642000.424872854.97.05850.205902827.36.69312200.444852897.37.14620.216862874.26.79032400.464552939.27.22950.227452919.66.88042600.484042980.87.30910.237792963.86.96502800.503363022.27.38530.247933007.37.04513000.522553063.67.45880.257933050.47.12163500.570123167.07.63190.282473157.07.29994000.617293271.17.79240.306583263.17.46384200.636083312-97.85370.316153305.67.52604400.654833354-97.91350.325683348.27.58664500.664203376.07.94280.330433369.67.61634600.673563397.27.97190.335183390.97.64564800.692263439.68.02890.344653433.87.70335000.710943482.28.08480.354103476.87.75975500.757553589.98.21980.377643585.47.89586000.804083699.68.34910.401093695.78.0259附表18（续）/00.00099873.010.00000.00099775.040.0002100.000998944.920.15070.000997946.870.1506200.001000586.680.29570.000999688.550.2952400.0010066170.150.57110.0010057171.920.5704600.0010158253.660.82960.0010149255.340.8286800.0010276377.281.07340.0010267338.871.07211000.0010420421.241.30470.0010410422.751.30311200.0010587505.731.52520.0010576507.141.52341400.0010781590.921.73660.0010768592.231.73451600.0011002677.011.94000.0010988678.191.93771800.0011256764.232.13690.0011240765.252.13422000.0011549852.932.32840.0011529853.752.32532200.0011891943.652.51620.0011867944.212.51252400.0681842823.46.22500.00122661037.32.69762600.0728282884.46.34170.00127511134.32.88292800.0771012940.16.44430.0422282855.86.08643000.0841912992.46.53710.0453012923.36.20643500.0905203114.46.74140.0519323067.46.44774000.0993523230.16.91990.0578043194.96.64464200.1027873275.46.98640.0600333243.66.71594400.1061803320.57.05050.0622163291.56.78404500.1078643343.07.08170.0632913315.26.81704600.1095403365.47.11250.0643583338.86.84944800.1128703410.17.17280.0664693385.66.91255000.1161743454.97.23140.0685523432.26.97355500.1243493566.97.37180.0736643548.07.11876000.1324273679.97.50510.0786753663.97.2553附表16(续)温度 压力 比体积 比焓 汽化潜热 比熵 t/p / MPa/95 0.084533 0.00103961 1.9827 397.98 2667.73 2269.7 1.2501 7.4154 100 0.101325 0.00104344 1.6736 419.06 2675.71 2256.6 1.3069 7.3545 110 0.143243 0.00105156 1.2106 461.33 2691.26 2229.9 1.4186 7.2386 120 0.198483 0.00106031 0.89219 503.76 2706.18 2202.4 1.5277 7.1297 130 0.270018 0.00106968 0.66873 546.38 2720.39 2174.0 1.6346 7.0272 140 0.361190 0.00107972 0.50900 589.21 2733.81 2144.6 1.7393 6.9302 150 0.47571 0.00109046 0.39286 632.28 2746.35? 2114-1 1.8420 6.8381 160 0.61766 0.00110193 0-30709 675.62 2757.92 2082-3 1.9429 6.7502 170 0.79147 0.00111420 0.24283 719.25 2768.42 2049.2 2.0420 6.6661 180 1.00193 0.00112732 0.19403 763.22 2777.74 2014-5 2.1396 6.5852 190 1.25417 0.00114136 0.15650 807.56 2785.80 1978-2 2.2358 6.5071 200 1.55366 0.00115641 0.12732 852.34 2792.47 1940.1 2.3307 6.4312 210 1.90617 0.00117258 0.10438 897.62 2797.65 1900.0 2.4245 6.3571 220 2.31783 0.00119000 0.086157 943.46 2801.20 857.7 2.5175 6.2846 230 2.79505 0.00120882 0.071553 989.95 2803.00 813.0 2.6096 6.2130 240 3.34459 0.00122922 0.05&-743 1037.2 2802.88 765.7 2.7013 6.1422 250 3.97351 0.00125145 0.050112 1085.3 2800.66 715-4 2.7926 6.0716 260 4.68923 0.00127579 0.042195 1134.3 2796.14 661.8 2.8837 6.0007 270 5.49956 0.00130262 0.035637 1184.5 2789.05 604.5 2.9751 5.9292 本表引自严家、余晓福编著水和水蒸汽热力性质图表，高等教育出版社，1995液体中分子的平均距离比气体中小得多。汽化时分子平均距离加大、体积急剧增大，需克服分子间引力并反抗大气压力作功。因此，汽化要吸热。单位质量液体转变为同温度蒸气时吸收的热量称为汽化潜热，简称汽化热。汽化热随温度升高而减小，因为在较高温度下液体分子具有较大动能，液相与气相差别减小。在临界温度下，物质处于临界态，气相与液相差别消失，汽化热为零。汽化有蒸发和沸腾两种形式。焓是汽体的一个重要状态参数。焓的物理意义为：在某一状态下气体所具有的总能量，它等于内能和压力势能之和。焓用符号i表示。 熵是热力学中的一个导出参数。熵的微小变化起着有无传热的标志作用。熵的引 入可以方便地反映出热力过程热量的转换及循环的热效率。在一个微小的热力过程中，如加入热量为q，加热时的温度为T，则这个过程的熵值s1 =q/T1。在一个完整的热力过程中的熵值ssi。 把热力过程部分得越微小(此时可认为T是一常数)所计算出的熵s值s越准确。用 积分方法：s=dq/T能算出精确结果。 水蒸气的熵值o点定为三相点(27316开)，则任意状态下的熵值便可以计算出来。