氨气的性质表1名称氨2化学式NH33CAS注册号7664-41-74相对分子质量17.0315熔点195.41K,-77.74℃,-107.93oF6沸点,101.325kPa(1atm)239.72K,-33.43℃,-28.17oF7临界温度405.65K,-132.5℃,-270.5oF8临界压力11.3mPa,112.78bar,111.3atm,1635.74psia9临界体积72.47cm3/mol10临界密度0.235g/cm311临界压缩系数0.24212偏心因子0.25213液体刻密度,25℃时0.602g/cm314液体热膨胀系数,25℃时0.00251/℃15表面张力,25℃时19.75×10-3N/m,19.75dyn/cm16气体密度,101.325kPa(atm)和70oF(21.1℃)时0.705kg/m3,0.0440lb/ft317气体相对密度,101.325kPa(1atm)和70oF时(空气=1)0.58818汽化热,沸点下1336.97kj/kg,574.9BTU/1b19熔化热,熔点下332.16kj/kg,142.83BTU/1b20气体定压比热容cp,25℃时2.112kj/(kg?k),0.505BTU/(1b·R)21气体定容比热容cp,25℃时1.624kj/(kg?k),0.388BTU/(1b·R)22气体比热容比,cp/cv1.30123液体比热容,25℃时4.708kj/(kg?k),1.125BTU/(1b·R)24因体比热容,-103℃时2.189kj/(kg?k),0.523BTU/(1b·R)25气体摩尔熵,25℃时192.67j/(mol?k)26气体摩尔生成熵,25℃时-98.94j/(mol?k)27气体摩尔生成焓,25℃时-45.9kj/mol28气体摩尔吉布斯生成能,25℃时-16.4kj/mol29溶解度参数29.217(j/cm3)0.530液体摩尔体积24.993cm3/mol31在水中的溶解度,25℃时全溶32辛醇-水分配系数,lgKow---33在水中的亨利定律常数,25℃时---34气体黏度,25℃时101.15×10-7Pa?s,101.15μP35液体黏度,25℃时0.135mPa?s,0.082cp36气体热导率,25℃时0.02466W/(m?k)37液体热导率,25℃时0.5024W/(m?k)38空气中爆炸低限含量16.1%(φ)39空气中爆炸高限含量25%(φ)40闪点---41自燃点651.1℃,1204oF42燃烧热,25℃(77oF)气态时18603.1kj/kg,7999.3BTU/1b43美国政府工业卫生工作者会议(ACGIH)阈值浓度25×10-6(φ)44美国职业安全与卫生管理局(OSHA)允许浓度值50×10-6(φ)45美国国立职业安全与卫生研究所(NIOSH)推荐浓度值25×10-6(φ)理想气体的定压比热容cp/(kj/kg·K)名称分子式温度/℃-4010601101602603604607601200氢H214.8314.2914.1114.0914.1814.4314.6714.8415.0216.25氧O20.93780.91690.91690.92530.94200.97971.0131.0431.0971.147氮N21.0891.0431.0261.0261.0341.0591.0891.1181.1721.252氨NH32.0052.0432.1142.1862.3032.5082.7002.8813.3293.869一氧化碳CO1.0841.0431.0291.0301.0381.0681.1011.1301.1891.264二氧化碳CO20.79970.82890.87090.90430.95461.0301.0971.1471.2431.340二氧化硫SO20.58620.60710.63220.65730.69080.74110.77870.81220.85410.8960硫化氢H2S0.98390.97970.99641.0131.0511.1181.1761.2351.3611.524甲烷CH42.0772.1892.3362.4662.6753.0313.3833.6894.5685.355乙烷C2H61.4651.6921.9132.0812.3362.7213.0773.3954.1534.823丙烷C3H81.3441.6031.8462.0262.2902.6843.0313.3374.0364.652