铜丝在硫蒸气中燃烧实验演示效果不好的原因有三点 :1.不识硫蒸气真面目硫在不同温度下有不同的状态表现 :常温下为黄色固体 ;在试管中加热硫粉至 96℃时开始状态转变 ,有黄色蒸气上升 ,硫升华 ;112℃时 ,变成易流动的黄色液体 ,并沿试管壁向上“爬”;16 0℃以上变成棕色具有粘 There are three reasons why copper wire is burned in sulfur vapour. The reason for the poor demonstration effect is as follows: 1. Sulfur vapour does not recognize the true surface sulfur at different temperatures have different state performance: yellow solid at room temperature; heating sulfur powder in the test tube to 96 °C When the state begins to change, there is a yellow vapor rise, sulfur sublimation; 112 °C, become a flow of yellow liquid, and “climb” along the wall of the test tube; 16 0 °C or more into a brown sticky