2-2通性和用途 稀有气体的物理性质：表13-2 He Ne Ar Kr Xe Rn I1/kJmo1237220871527135711761043 m.p./℃-272-249-189-157-112 -71 Sml/kgH208.610.533.659.4 108 230 临界温度K5.2544.5150.9209.4289.7378.12-2 通性和用途 稀有气体的物理性质：表13-2 He Ne Ar Kr Xe Rn I1 /kJ·mol-1 2372 2087 1527 1357 1176 1043 m.p./℃ -272 -249 -189 -157 -112 -71 S/ml/kg H2O 8.6 10.5 33.6 59.4 108 230 临界温度/K 5.25 44.5 150.9 209.4 289.7 378.1