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| Posted by signmeup74 | 03/27/06 |
| You can also raise the boiling point the same way. Good job, Swaffy!! :D |
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| Posted by fem81uk | 03/27/06 |
| I've obviously learnred something at college! |
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| Posted by AZTTT | 03/27/06 |
| Hence the science behind home-made ice cream! good job. Keep em coming. :D :D :D |
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| Posted by luvmyself | 03/27/06 |
| you learn something new everyday =) nice one! |
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| Posted by hellokitty593 | 03/30/06 |
| I thought is was ice. |
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| Posted by brainjuice | 04/02/06 |
| i got it right! nice one.. :D |
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| Posted by Winner4600 | 04/06/06 |
| yay i got it right!!! :D |
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| Posted by ChrisKing | 04/21/06 |
| You learn something new every day!!!! :P :D 8) |
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| Posted by GeniusGod | 04/23/06 |
| It was very very very easy. |
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| Posted by mabelrxu | 04/27/06 |
| you do not have to only add salt...any chemical will do...this works because it decreases the attraction between the water molecules by acting as "spacers" between the water molecules. When trying the freeze the solution, the average kinetic energy (aka temperature) has to be lower in order for the solution to stabilize into a solid state...the formula for finding the freezing point depression and boiling point elevation are respectively as follows(replacing words in parenthesis with appropriate symbols):
(delta)T(subscript f) = (italics i)K(subscript f) x molality
(delta)T(subscript b) = (italics i)K(subscript b) x molality
where the (italics i) is the van't Hoff factor, K(subscript f) is the Molal Freezing-Point Depression Constant and K(subscript b) is the Molal Boiling-Point Elevation Constant.
too much information, anyone? :o |
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| Posted by Onslaught | 05/01/06 |
| This was fun and easy until I read mabelrxu's answer.It was still but I had to get rid of the easy because of my favorite question,WHY. :wink: |
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| Posted by _numpty_ | 05/07/06 |
| Thanks to mabelrxu for answering the question "how is this possible?"
Shame the teaser answer gave us what not why... |
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| Posted by liberalgeek | 05/12/06 |
| wrong above post
any polar substance
non polar and it wont mix |
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| Posted by udoboy | 05/26/06 |
| Hello Kitty, if you added ice at an extremely low temperature, all you would do is freeze the water, making it all ice. The idea was for it to still be liquid.
Anything soluble is good, and the more ions produced is better. CaCl2 is better than NaCl, for instance. |
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| Posted by dantak | 06/17/06 |
| liberalgeek. Let's be exact if we are going to bring into question somone else's post. There is not just polar and non-polar. With the exception of diatomics like nitrogen gas, everything is polar to some degree. Water is very polar, but I can still get some less polar solvents to dissolve in it. Ethanol is miscible in water but less polar. The real question is about solubility, anything that dissovles, even a little, in water will lower it's freezing point, and elevate its boiling point.
Tschuss |
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| Posted by speedqueenkmw | 07/13/06 |
| holy moley, much more than i wanted to know :roll: |
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| Posted by vbguy101 | 08/18/06 |
| Ethelyne glycol is much more effective.
(It's antifreeze!) |
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| Posted by ttviper | 10/17/06 |
| Hey! I saw that on Mythbusters. |
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| Posted by i_luv_2_read | 12/27/06 |
| this is why seawater can be so cold and not freeze .....although it does freeze eventually.... whatever ... i should've remembered the exact chemistry from last year, but sadly i didn't. I like chemistry!!!!!! :D :D :D :D |
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| Posted by vikingboy | 01/20/07 |
| alcohol does the same trick. Many people keep their vodka in the freezer. |
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| Posted by MelkorDCLXVI | 03/05/07 |
| i wanna try thta!
cool!
:o |
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| Posted by Caim | 04/15/07 |
| Covering this in chemistry now. Curse you colligative properties! |
