定义Definition
丙烷 C₃H₈（CH₃CH₂CH₃）是含三个碳原子的烷烃，常温下为无色无味气体，加压后易液化，是液化石油气（LPG）的主要成分之一，用作燃料和制丙烯的原料。
Propane, C₃H₈ (CH₃CH₂CH₃), is the three-carbon alkane, a colourless, odourless gas that liquefies easily under pressure. It is a main component of liquefied petroleum gas (LPG) and is used as a fuel and as a feedstock for propene.
燃烧Combustion
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O，ΔcH° = −2220 kJ mol⁻¹。按单位质量计放热约 50 kJ g⁻¹，热值高，燃烧较清洁。
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, ΔcH° = −2220 kJ mol⁻¹, about 50 kJ per gram, a high energy content with relatively clean combustion.
卤代产物Halogenation products
光照下与氯气发生自由基取代，得到 1-氯丙烷和 2-氯丙烷的混合物。丙烷有 6 个伯氢和 2 个仲氢，仲氢更容易被取代，因为生成的仲自由基更稳定。
In light it undergoes radical substitution with chlorine to give a mixture of 1-chloropropane and 2-chloropropane. Propane has six primary and two secondary hydrogens; the secondary ones are replaced more readily because the secondary radical is more stable.
化学性质Chemical properties
燃烧：C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Combustion: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
裂解脱氢：C₃H₈ → C₃H₆ + H₂
Dehydrogenation: C₃H₈ → C₃H₆ + H₂