non je crois qu'il bout et se glace en même temps , a la même température ,après c'est la pression qui change ,a cause de la réaction , c'est ça qui est étonnant
The video above is what happens if a liquid is placed in conditions where the temperature is right at the point where it freezes and the gas pressure is removed. With no pressure it can't stay liquid, but it is right on the cusp between boiling and freezing, so it does a little of both. Going from liquid to gas absorbs energy, while liquid to solid changes release it. This can keep the process in balance - if too much material boils the temperature will fall, shifting the balance in favor of freezing.
Dernière modification par moguai34 (19 mai 2014 à 23:00)