Show of HandsShow of Hands

Shazam November 19th, 2019 1:08am

Can unpressurized water be chilled to below 32°F (0°C), and not freeze?

10 Liked

Comments: Add Comment

badattitude no place like home
11/19/19 12:19 am

That’s how you can get the cream below the temperature of ice by adding salt to the ice. By forcing the ice to melt it will pull the heat out of the cream to a much colder temperature than it was originally. Bingo. Ice cream in the summer

badattitude no place like home
11/19/19 12:16 am

It takes 1 calorie per gram of water to convert ice to water or water to ice at the same temperature.

badattitude no place like home
11/19/19 12:15 am

Great question. Super cooled water droplets impact airplanes and the energy of impact will convert the water to ice. It then sticks on the airplane and can cause loss of lift. We have heaters on the wings to melt it.

bringstheeagle Colorado
11/18/19 8:19 pm

🤷🏻‍♂️ no clue 😊 outta my zone here.

RatBaby
11/19/19 12:24 am

Alternatively use very clean water in a smooth walked vessel, the ice won't have any nucleation points

Quinnipiac Here
11/18/19 7:37 pm

you only have so many degrees of freedom. once you set P and T, and two phases (vapor and (L or S), you’ve fully defined the system.

Reply
Wert A picture of my junk
11/18/19 6:22 pm

Supercooling. Very pure water, clean, smooth container, and a whole lotta cold. By not providing any nucleation points for crystals to seed on, water can get as cold as -47°C without crystallizing. At -47°C, water has to crystallize.

Reply
Shazam Scaramouche, OH
11/18/19 7:32 pm

Can you come up with an easier way?

Shazam Scaramouche, OH
11/18/19 7:35 pm

You get the points though!

Shazam Scaramouche, OH
11/18/19 6:12 pm

The answer is "yes." But how?

Reply
Shazam Scaramouche, OH
11/18/19 6:11 pm

First correct answer receives 1,000 points.

Shazam Scaramouche, OH
11/18/19 6:12 pm

To the Q above!