Physics can explain this?

[Pl8er 5,000+ posts]

Hopefully someone can answer this because it is bugging me. I had two NOS energy drinks in the car. One was open and one was not. This morning the one that was opened had almost completely frozen while the sealed one had stayed totally liquid.

Both were lid tight, why did only one freeze?

Click to read more...

 

[bose301s 5,000+ posts]

The unopened one had higher pressure keeping it a liquid.

 

[Mountainman11 10+ year member]

^^ what he said

 

[Pl8er 5,000+ posts]

The unopened one had higher pressure keeping it a liquid.

Is it really that simple? More pressure prevents freezing?

 

[Mountainman11 10+ year member]

yes. Also, if you put a liquid like water in vacuum it will boil at room temp.

 

[Pl8er 5,000+ posts]

yes. Also, if you put a liquid like water in vacuum it will boil at room temp.

Wow! Good to know! Thanks fellas.

 

[hoss 5,000+ posts]

The unopened one had higher pressure keeping it a liquid.

True, but there is more to it...

Is it really that simple? More pressure prevents freezing?

No, at least, not always.

yes. Also, if you put a liquid like water in vacuum it will boil at room temp.

Not true with all liquids.

Different liquids, depending on their properties, will react differently to pressure. Sodas and beers will remain unfrozen while under pressure, but once the pressure is taken away, it could present an "instant" freeze effect. Engine coolant, on the other hand, is designed to have an increased boiling point while under pressure. The coolant system as a whole operates under pressure, and the pressure increases the boiling point so it wont present bubbles in the system. Take the pressure away, the coolant will boil nearly instantly.

 

[Mountainman11 10+ year member]

I stand corrected

 

[Pl8er 5,000+ posts]

You know, you are some smart mothafuckas.

Thanks //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Rashaddd 5,000+ posts]

I thought this was relatively common knowledge

 

[mugen08 10+ year member]

Right on guys.

Example= Crude oil refineries heat crude oil to 650 degrees or so and introduce the oil to a large tower at atmospheric pressure. At this temperature, most of the oil evarorates, rises into the tower, and later condenses into kerosene, deisel, gasoline, butane, and propane (each condensing back at a lower and lower temperature).

The product that doesn't evaporate (basically a sludge, like liquid asphault), leaves the bottom of the tower and goes to a "vacuum) unit. In this unit, it is heated to about 750 degrees, and introduced to a vacuum that causes the heavy liquid to boil, and extract any remaining gases.

On the other end of the process, the butanes and propanes that rise out of the first tower are compressed and turned back into a liquid for storage and transport.

So.....Lower pressure=lower boiling temperature

.........Higher pressure= higher boiling temperature.

This is why you can compress water to 800 psi or so and heat the shit out of it until it boils, creating a superheated steam that is invisible but can cut you in half at that pressure and temperature.

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[iamamp3pimp 5,000+ posts]

why does a pepsican freeze in the freezer, causing the liquid to solidify, expand, and burst the can then?

im guessing its just to a certain extent?

 

[iamamp3pimp 5,000+ posts]

Right on guys.
Example= Crude oil refineries heat crude oil to 650 degrees or so and introduce the oil to a large tower at atmospheric pressure. At this temperature, most of the oil evarorates, rises into the tower, and later condenses into kerosene, deisel, gasoline, butane, and propane (each condensing back at a lower and lower temperature).

The product that doesn't evaporate (basically a sludge, like liquid asphault), leaves the bottom of the tower and goes to a "vacuum) unit. In this unit, it is heated to about 750 degrees, and introduced to a vacuum that causes the heavy liquid to boil, and extract any remaining gases.

On the other end of the process, the butanes and propanes that rise out of the first tower are compressed and turned back into a liquid for storage and transport.

So.....Lower pressure=lower boiling temperature

.........Higher pressure= higher boiling temperature.

This is why you can compress water to 800 psi or so and heat the shit out of it until it boils, creating a superheated steam that is invisible but can cut you in half at that pressure and temperature.

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

the last part, is that how a waterjet machine works?

 

[Mountainman11 10+ year member]

why does a pepsican freeze in the freezer, causing the liquid to solidify, expand, and burst the can then?
im guessing its just to a certain extent?

That's because the water in the can expands as it gets colder, where most liquids contract. Water is densest at 4 degrees C and expands everywhere below that

 

[Pl8er 5,000+ posts]

the last part, is that how a waterjet machine works?

We have a waterjet, and it is not like that. High pressure and sand actually. I want to say 30,000psi