Freezing by Boiling - Science Theater 06

It seems unnatural, but the laws of physics don't lie. Liquids require heat to boil, and if the conditions are right one liquid can be boiled in order to freeze a second. Under a vacuum, the water in an acetone/water mixure can freeze while the acetone boils.

Category:

Entertainment

Tags:

• science
• physics
• education
• acetone
• vacuum
• boiling
• freezing
• demo

[skatedude74]

why is his hair so green?

[sciencetheater]

@skatedude74 I like green.

[Lachieh923]

you can do this way easier buy spraying butane from a lighter refiller onto water

[sciencetheater]

@Lachieh923 True, but then you're not really "boiling" the liquid you're trying to freeze.  (I could have also just put the water in the freezer, but where's the fun in that?) :)

[ajitheman5]

Love the color of your hair.

[alexandra19160]

@skatedude74did he mess while playing with chemicals in his theatre ?? xD :O

[gunmanscotland]

He is The Riddler thats why his hair is green

[flyingjazz]

This video is good preparation for undergraduate thermodynamics courses where the first question asked must be, "What is my system?" This usually involves drawing a cartoon of the process and putting a dashed line around the particular thing that you're interested in. Different "sub-plots" emerge if an open system is defined (for example, all the flask contents or the liquid acetone in the flask) or if a closed system is defined (for example, all the acetone regardless of its location or state).

[Fallingangel100]

Love your videos, definitely subscribed.

[sciencetheater]

@kionay Sounds like you got it. Acetone boils due to low air pressure, cooling it off (perhaps think of evaporation rather than boiling), which reduces the temperature of the liquid, so the water in the liquid turns to ice.