乾冰達到它的沸點會點?

會昇華成二氧化碳氣體。係固體乾冰直接轉化成氣體的過程。

The boiling point (沸點) of dry ice is -78.5 degrees Centigrade, whereas its melting point is -56.6 degrees C. Because the melting point is higher than the boiling point, dry ice (solid carbon dioxide) changes to carbon dioxide gas directly when its temperature reaches its boiling point (i.e. -78.5'C). This is the sublimation (昇華) process.

Ref: http://elmhcx9.elmhurst.edu/~chm/vchembook/104Aphysprop.html

2015-06-12 15:57:53 補充：
Carbon dioxide can be in liquid form under a pressure of 5.1 atm.

乾冰會變成氣體狀既二氧化碳