["Нефть общие свойства",,"Нефть обычно является желто-коричневой или черной, вязкой или полужидкой жидкостью,",".,8-11.18之间，但个别也有比水重的，比重达到-11.02。石油基本上由五种元素即碳、氢、硫、氮、氧所组成。其中碳的质量分数一般为83～87%;氢的质量分数一般为-;11～-;4%;硫的质量分数一般为-;05～8%;氮的质量分数一般为-;02～-%;氧的质量分数一般为-;05～-%;此外还有微量的金属和非金属元素。蒸气压、沸程和平均沸点。密度-;222(标准密度)、相对密度ｄ4-;;;2、特性因素(K) 平均相对分子质量。(汽油的平均分子质量为-;;1～-;;;;;柴油的平均分子质量为-;;2～-;4;;减压侧是馏分蜡油的平均分子质量为-;;;～-;4;;减压渣油的平均分子质量为-;;;;;油品的粘度。(动力粘度;运动粘) 临界性质、压缩因子及偏心因子。热性质:焓;质量热容;汽化热 表面张力、界面张力、折射率、导热系数"

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