Why does water expand when fozen while everything else gets smaller when cooled?
351728
Uh, "shrinkage" is not a universal phenomenon.  It applies only in specific circumstances,
590891
All matters dosnet expand on heat. Take ice, it shrinks or melts on heat. Hope you liked my short and sweet answwer.
694248
Ok, here's how it breaks down.  Water freezes in a unique way compared to most other liquids.  Water freezes in a crystalline latice structure that looks like layers of hexagons.  That's why water expands when it freezes into ice.\n\nNow the second part of the answer is that when you dissolve something like salt or sugar into water, you lower the freezing point of water.  The additives or solutes disturb the way that water freezes by interfering with the water molecules as they try to freeze into their lattice pattern.  This disturbance does not fully prevent water from freezing, it only lowers the freezing point.  As long as it's cold enough, water can still freeze into ice.  By lower the freezing point, the water needs to get colder and colder to be able to turn into ice.  The other side of this is that you can dissolve more things in a hot liquid than a cold liquid.  When you dissolve something to its limit into a liquid, it's called saturating the liquid.  Also, you can dissolve a lot of something in a liquid when it's hot, but then let it cool without disturbing it and it will be a supersaturated solution.\n\nBeer is not only a solution (something dissolved in water), it is a special solutions because of carbonation.  The process of carbonation involves forcing carbon dioxide bubbles through water to  force the carbon dioxide to dissolve in the water or in this case beer.  When they bottle beers, the company is actually supersaturating the beer with carbon dioxide, that's why it always foams a little when opened.\n\nBecause beer has carbon dioxide in it, it's freezing point is lowered so it is less likely to freeze.  When you cool the beer down below freezing with the cap on, the beer will not freeze, but once you open it, you release the carbon dioxide.  As the beer quickly loses the dissolved carbon dioxide, the freezing point for the beer quickly goes up.  Once freezing point gets up to the temperature of the superchilled beer, the beer freezes and turns into a solid.
549327
Freezing water expands.
101321
Good question.\n\nPressure of the trapped gas is supposed to decrease with lowering the temperature.\n\nBut, water increases in volume as its temperature is increased below 4 degree C. In other words, water has the maximum density at 4 degree C. Increasing or decreasing its temperature from that point will make it expand.
628194
It decreases ever so slightly.\n\nFrozen water has a larger volume than liquid water (this can be inferred from the fact that it is less dense; alternatively you can show it is less dense if you know it has a bigger volume), so as more water goes from solid (ice) -> liquid (water), the total volume decreases.\n\npeople have been saying it increases; this is incorrect! When you put water in a cup and leave it in the freezer, the cup breaks. This is because water EXPANDS as it turns into ice; therefore it will CONTRACT when it melts.
279658
Ice floats on water because it is less dense than water, meaning it has fewer molecules per volume. This is because of the Hydrogen bonds. In fact, while other substances contract when solidified, water expands. That's why it's less dense, and not because it has air inside. Furthermore, when the temperature decreases and reaches 4 degrees Celsius, every water molecule is Hydrogen-bonded to 4 other molecules near it. Then, they form into a crystal lattice structure, and it holds them further apart.
480166
If you have an equal volume of hot and cold water the cold water will be heavier.  This is because when you heat up a substance it become less dense, and in general when you cool down a substance it becomes more dense.\n\nThe exception to the rule is water though.  Water is most dense at 3 degrees cesius, after that it start to take a crystalin form and when it freezes actualy expands.  \n\nso long as you are not saying that the cold water is 1 degree and the hot water is 3, then the cold water will be heavier\n\n\nBut remeber it is not by much in any case
319184
if the cold thing is cold and crystaline, like pyrex or ice, the object cracks because of rapid localised expansion.\n\nIf it is really really cold, the water will crystalise.\n\nIf cold water hits something hot it forms little drops with a protectice steam jacket and they bounce around for ages, a cool experiment for home on a hot frying pan. (only uses drops of water though)
895765
Temperature must get below 32 degrees Fahrenheit or 0 degrees Celsius.\n\nWhen it gets that cold, the H2O particles have more resistance moving around until they move around less and less until water freezes. The particles are still moving... just very slowly. The particles also get larger in this process; thus the reason why ice expands.
356807
The answer lies in the question: if something is less dense, that means its mass is spread out over a larger volume. To say that ice has 9/10 the density of liquid water is to say that its volume has increased by 1/10:\nIf you take 1 pint of water and set it aside, and take another pint of water and freeze it, you will find that the water expanded in the latter by 1/10, without losing any mass or weight. It does not become lighter, it becomes more spread out in area and volume. The same principle is applied when you have snowshoes on in deep snow: your weight is more spread out on the snow, therefore you do not sink.
803295
The most plausible answer is 3.\n\n- As air expands, it does cool.\n- Cooler air is able to hold less water, so is saturated far quicker.\n- When air is saturated, water droplets will condense out of the air on many available surfaces, including on lenses.
1142972
In short, ice float in water because it is less dense.\n\nDensity = mass / volume\n\nFor a more thorough explanation, one needs to look at what happens when liquid water freezes into solid water (ice).\nAs the water freezes and becomes a solid, it expands.  The volume of a given mass of water becomes larger, therefore the density decreases.  Without going into the effects of buoyancy to explain "why" less dense things float (the weight of the fluid they displace is greater than the weight of the object), just accept that they do.\n\nTo be even more thorough,\nWater expands when it freezes because of the strong, "Hydrogen bonding", intermolecular forces which exist between the water molecules in the liquid/solid.\nWhen water is a liquid, the molecules have much more freedom to move around and rotate any way they please, but when the water freezes into a solid, the molecules have significantly less energy (thus less freedom to move around) and try to take on the most stable/low energy state they can...which happens to be in a lattice structure which has a higher volume that when the molecules were in the liquid state.  So it is because of the Hydrogen bonding present between the water molecules that solid ice float in liquid water.
790704
1. Ice is one of the only known liquids that actually expands as it freezes. This is due to hydrogen bonds forming between the water molecules, which line up molecules less efficiently (in terms of volume) when water is frozen.\n\n2. Tea in a saucer has much more surface area than tea in a cup, therefore it cools much faster.\n\n3. These pots are made of a material with the property of insulating and protecting the water from infrared light. With less infrared light, the water is cooler.\n\n4. Water is a green house gas, which means the more water there is in the air; the more infrared light reflecting off the ground (which initially comes from sunlight of the visible spectrum) will be reflected back to earth. On a dry day, with less clouds and moisture, infrared light is better able to escape into the atmosphere. Sand is no conductor, so it is constantly emitting infrared rays to cool down. The more heat, the more it cools.\n\n5. Homogenous literally means "same throughout". It is a mixture that appears to be of a constant chemical makeup, such as salt dissolved in water. Heterogeneous means "made of different materials". An example of a heterogeneous mixture could be oil in water (the water is more dense, the oil floats on top).
854162
I assume you mean how does that work.\n\nMost liquids expand when heated and contract when cooled. The alcohol in thermometer will expand (rise) when heated and contract (fall) when cooled.
542873
Given that water in an hypotonic environment would tend to enter the cell, causing it to swell, it would constitute an expanding force aiding cell´s growing. Think of a baloon when you blow air into it: it kindda grows.
362166
That is adiabatic cooling (by expansion). When air is forced to expand (like when it rises) it will become cooler.\n\nWhen air is forcefully compressed, that is adiabatic heating.\n\nThe answer is ADIABATIC TEMPERATURE CHANGES