Can you please tell me how you evaporate water i need to know for a chemistry experiment. thank you
2007-09-03 14:52:54 · 4 answers · asked by Brittney 2 in Science & Mathematics ➔ Chemistry
Gentle heat until all the water is gone and turned into water vapor. The water is heated to a point BELOW the boiling point of water.
According to Wikipedia: http://en.wikipedia.org/wiki/Evaporate
"Evaporation is the process by which molecules in a liquid state (e.g. water) spontaneously become gaseous (e.g. water vapor), without being heated to boiling point. It is the opposite of condensation. Generally, evaporation can be seen by the gradual disappearance of a liquid, when exposed to a significant volume of gas."
Gas has a relationship between its pressure and its temperature. If you compress or pressurize a gas it has to heat up since the same amount of moving molecules need to fit inside the same space. So if you put your flask with water in it under high pressure the heat from that higher pressure will evaporate your water.
The reverse method is how we make liquid oxygen and other super cold gases. We compress the gas, heating it up and then cool it off. Then when we expand the volume the gas has to cool down even more. This is because the molecules suddenly have a much larger space to move around in. With fewer collisions there is less heat created. If you cycle oxygen through this system enough times you can turn it into a liquid, even though we don't have a normal freezer that can cool gases that cold.
drochem is wrong because the process of evaopration, in chemisty, requires you to NOT boil the water.
2007-09-03 15:01:38 · answer #1 · answered by Dan S 7 · 0⤊ 0⤋
There are several factors affecting the rate of evaporation of a liquid.
Probably the most important two factors are the temperature of the liquid that is evaporating, and the humidity of the air into which the water is evaporating.
If the air is "dry," the water will evaporate faster than if the air is very humid. And warmer water evaporates faster than cold water. Probably the temperature of the spa water is warmer than that of the swimming pool. And possibly the air around the spa is drier than that over the swimming pool.
Other factors being equal, the size of the container of the water should not matter.
Wendell Bechtold, meteorologist
Forecaster, National Weather Service
Weather Forecast Office, St. Louis, MO....
2007-09-03 20:19:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
no. the water will evaporate, but it will leave the salt behind. im not for sure though because thats what my crazy science teacher says.
2016-05-20 22:40:22 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Boil it.
2007-09-03 15:04:43 · answer #4 · answered by Anonymous · 0⤊ 0⤋