乾冰(dry ice)係固態二氧化碳,即係二氧化碳嘅冰[1]。佢好多時都用來做冷卻劑,好多地方都用到。

升華緊嘅乾冰粒

大氣之下,乾冰曉昇華,直接氣態昇華點響-78.5 °C昇華要嘅能量係(ΔHsub)喺-78.5 °C之下要571 kJ/kg。乾冰密度1.2到1.6 kg/dm³之間。乾冰冷凍效能好好,因為佢重凍過冰,但唔會留濕氣[2]

  1. "dry ice". The American Heritage Dictionary of the English Language, 4th ed. Boston: Houghton Mifflin. 2000. 原著喺2009-01-31歸檔. 喺2007-08-21搵到.
  2. Solar Navigator on Carbon Dioxide, retrieved 5 July 2007