气体性质(API)气体 | 分子量 M | 15.6℃及大气压下的比热比k=Cp/Cv | 15.6℃及大气压下的临界压力比 | 15.6℃及大气压下的比重Gv | 临界常数 | 大气压下的冷凝温度 ℃ | 可燃性限在空气中的容积百分比 | 压力 kPa | 温度 ℃ | 甲烷a | 16.04 | 1.31 | 0.54 | 0.554 | 4640 | –82 | –162 | 5.0 – 15.0 | 乙烷a | 30.07 | 1.19 | 0.57 | 1.058 | 4950 | 32 | –89 | 2.9 – 13.8 | 乙烯a | 28.03 | 1.24 | 0.57 | 0.969 | 5116 | 10 | –104 | 2.7 – 34.8 | 丙烷a | 44.09 | 1.13 | 0.58 | 1.522 | 4254 | 97 | –42 | 2.1 – 9.5 | 丙烯 | 42.08 | 1.15 | 0.58 | 1.453 | 4599 | 92 | –48 | 2.8 – 10.8 | 异丁烷a | 58.12 | 1.10 | 0.59 | 2.007 | 3647 | 134 | –12 | 1.8 – 8.4 | n-丁烷a | 58.12 | 1.09 | 0.59 | 2.007 | 3799 | 151 | –1 | 1.9 – 8.4 | 1-丁烯 | 56.10 | 1.11 | 0.59 | 1.937 | 4040 | 147 | –6 | 1.4 – 9.3 | 异戊烷a | 72.15 | 1.08 | 0.59 | 2.491 | 3330 | 187 | 28 | 1.4 – 8.3 | n-戊烷a | 72.15 | 1.08 | 0.59 | 2.491 | 3378 | 197 | 36 | 1.4 – 7.8 | 1-戊烯a | 70.13 | 1.08 | 0.59 | 2.421 | 3930 | 192 | 30 | 1.4 – 8.7 | n-己烷a | 86.18 | 1.06 | 0.59 | 2.973 | 3013 | 234 | 69 | 1.2 – 7.7 | 苯 | 78.11 | 1.12 | 0.58 | 2.697 | 4923 | 289 | 80 | 1.3 – 7.9 | n-庚烷a | 100.20 | 1.05 | 0.60 | 3.459 | 2737 | 267 | 98 | 1.0 – 7.0 | 甲苯 | 92.13 | 1.09 | 0.59 | 3.181 | 4068 | 318 | 111 | 1.2 – 7.1 | n-辛烷a | 114.22 | 1.05 | 0.60 | 3.944 | 2496 | 296 | 126 | 0.96 – 6.7 | n-壬烷 | 128.23 | 1.04 | 0.60 | 4.428 | 2289 | 321 | 151 | 0.87 – 2.9 | n-癸烷 | 142.28 | 1.03 | 0.60 | 4.912 | 2096 | 333 | 174 | 0.78 – 2.6 | 空气 | 28.96 | 1.40 | 0.53 | 1.000 | 3771 | –141 | –192 | — | 氨 | 17.03 | 1.30 | 0.53 | 0.588 | 11280 | 132 | –33 | 15.5 – 27.0 | 二氧化碳 | 44.01 | 1.29 | 0.55 | 1.519 | 7384 | 31 | –78 | — | 氢 | 2.02 | 1.41 | 0.52 | 0.0696 | 1296 | –240 | –253 | 4.0 – 74.2 | 硫化氢 | 34.08 | 1.32 | 0.53 | 1.176 | 9005 | 101 | –61 | 4.3 – 45.5 | 二氧化硫 | 64.04 | 1.27 | 0.55 | 2.212 | 7881 | 158 | –10 | — | 蒸汽 | 18.01 | 1.33 | 0.54 | 0.622 | 22104 | 374 | 100 | — |
a 估算值。
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