What are some methods of cooling such as chemicals and other methods?
89089
Besides the typical methods such as refrigeration which uses expanding freon or amonia gas to transfer heat or standard evaporation, two other electro-mechanical methods come to mind.\n\nOne method is a thermoelectric cooler which can heat or cool based on the direction of DC electric current flow. It is built from a junction of two metals which are different and when DC current passes through the junction, heating or cooling can occur depending on the direction of the flow of the DC current. This is known as the Peltier effect.\n\nThe second totally mechanical method is known as a Vortex seperator. Air is introduced at high speed into a tube with a curving vane inside. As the air spins up through the tube, the colder air, which is heavier is forced outside due to centrifical force while the air moving up the center is warmer and lighter than the cold air. The difference in the weights of the cold and warm air cause them to seperate from each other with the cold air unable to make the tight turns and is forced to the outside of the tube as it spins to the top. These units typically have a cold air output connection on the outside of the tube at the end and a warm air connection in the center of the tube at the end.
1008417
Liquid air is being used for rapid cooling.
385728
mix potassium chloride with chlorine \n\nlol chemical weapons
931739
By lowering temperature.
778647
By fractional distillation.\nDEG distills at 93 'C, you can collect first and then collect water at 100 'C.
495729
The right way of cooling a pc is by putting one at the front and one at the back. The front sucking cool air from outside and the back blowing out the hot air from inside. If one of them is working the wrong way, air inside is trap and there's not cooling action.
544081
ok remember that freon or r134 are used in AC but is not like it is a substance that stays cold... you to compress it in order to make it liquid and then it absorves heat and evaporates completing the cycle... if you are looking for a sort of system that will make something stay cool.. .hmmm man it is called Air Conditioned
1056027
It's ALMOST impossible as there are so many fast ways to PRODUCE heat, but all methods to REMOVE heat are slow. They all rely on foods and drinks to BECOME cold based on the ambient temperature inside of the unit, rather than more direct methods like, for example, spraying a mug of ale with liquid nitrogen. Which would work great, but would be horribly dangerous to trust to the public.
596395
Benzene + benzoyl chloride + AlCl3 is one\n\nYou can also do \n\n2 calcium benzoate + LOADS OF HEAT --> benzophenone + CaO + CO2
697296
Baking soda added to water raises the temperature slightly.\n\nBaking soda and water is exothermic and so the water gets a little warmer. This is because the binding energy of the chemical bonds of the products has an excess over the binding energy of the components. Therefore, energy is released and the water warms up.\n\n\nBaking soda is NaHCO3 and water is H2O. Added together you get NaOH and H2CO3 which are sodium hydroxide and carbonic acid. \n\nCarbonic acid is the fizz in soda. Eventually the mixture releases CO2 gas when the H2CO3 breaks down into H2O and CO2. The solution of H2O and CO2, if left alone uncorked, will lose its fizz. The water CO2 mixture will cool off slightly when the fizz (CO2) is released because the CO2 takes some energy with it. As the water evaporates it cools off because the warm molecules of water evaporate first! That's right! The warm ones!
10515
water freezes at 32 F.  When you add other substances to water, you create a soliable compound and the solution takes on some of the quality of the other substance.  Adding salt or sugar prevents the solution from freezing at 32 F. Juices or bullion cubes would work in a similar manner.  if you're going camping, sleep with your water in your sleeping bag ;)
659958
sure- it's easy- the refrigeration system moves heat out of one area into another- and simple experiment for you to do, is take a can of pressurized spray whatever, and spray it- can gets cold from reduction in pressure, allowing molecules space to "slow down" because they quit "bumping" from being in a tight spot- making room for more heat- or "making" cold- with me so far? now just picture a system with a pump that packs the gas molecules tightly together, and on the other end has a spot for them to expand (making room for more heat)and then runs the "heated" expanded gas through a radiator (heat comes out) and then gets compressed (packed) again- round and round "absorbs heat- moves heat- loses heat" \n hope this helps- if you really need more help email me through answers and I can provide pictures of how it works.
792555
Modern Refrigeration. \n\nSource(s):\n\nhttp://www.constructionbook.com/xq/asp/q...
192978
Evaporative cooling. Alcohol evaporates easily. In order to evaporate, the alcohol takes heat away from the skin, reducing the body temperature. It works in the same way sweating does.
200829
Take it somewhere colder than 32 degrees farenheit.\n\nWrap it in an insulated container, and wrap that in an insulated container, too.\n\nSurround it with more ice.\n\nSurround it with items that are colder than the ice (such as supercooled oil).\n\nThere are many ways.  Which one is practical for you and your uses?
113741
This is called evaporative cooling.\nThe water is cooler than your skin and absorbs this excess heat until it reaches evaporation temperature. As the water evaporates it releases this heat into the air which must be cooler than your body for this process to work. This is why sweating helps cool the body. The hotter and more humid the air temperature, the slower the evaporative cooling effect takes place.
287510
I think it's more letting the battery rest that does the trick.  Some people think, that because the reaction inside a battery causes it to heat up, cooling off the battery will give it more life. The cool air may contribute to helping the active agents inside a battery settle, like this excerpt from a similar question on howstuffworks.com:\n\n"To understand why this happens, it is helpful to understand what's going on inside the battery. Let's take the simplest zinc/carbon battery as an example. If you take a zinc rod and a carbon rod, connect them together with a wire, and then immerse the two rods in liquid sulfuric acid, you create a battery. Electrons will flow through the wire from the zinc rod to the carbon rod. Hydrogen gas builds up on the carbon rod, and over a fairly short period of time coats the majority of the carbon rod's surface. The layer of hydrogen gas coating the rod blocks the reaction occurring in the cell and the battery begins to look "dead". If you let the battery rest for awhile, the hydrogen gas dissipates and the battery "comes back to life". \n\nIn any battery, be it an alkaline battery found in a flashlight or a lead acid battery in a car, the same sort of thing can happen. Reaction products build up around the two poles of the battery and slow down the reaction. By letting the battery rest, you give the reaction products a chance to dissipate. The higher the drain on the battery, the faster the products build up, so batteries under high drain appear to recover more. "