how does sea water evaporate even when the temperature there is much below 100 degrees Celsius ?

Answer 1

Where would you get the idea that it's evaporating? Keep in mind that Cold = Dry. But the atmospheric temperature doesn't have to reach boiling in order for water to turn into humidity. Remember that sunlight heats up water before air. And water can turn into humidity without evaporating.

Answer 2

100 degrees celsius temperature at which pure water boils and the salt in sea water gives it a boiling point of about 103 degrees but evaporation can occur at temperatures much lower than that.
the more energy water is given, so the higher the temperature is, the more water particles that have sufficient energy to break free of the liquid water and rise as gas particles.
so at 100 degrees a great number of the water particles will be breaking free and the liquid water will reduce rather quickly but at 20 degrees only a very few water particles will be turning into gas and evaporating.

Answer 3

It's a kind of complex answer.

Basically what happens is if you look at evaporation rates at various temperatures, and graph it, you'll get a curve. At low temperatures, only a few molecules of water will break off from the liquid pool and become a gas. Most will stay water.

Boiling temperature, 100 deg C, is an "activation temperature," I guess is the best way to put it - the temperature at which you KNOW water will boil.

But at lower temperatures, sunlight will cause some water molecules to become energized enough that they become gaseous. Just not many of them. As temperature rises, a few more will become energetic enough to be a gas, and so on and so forth.

It's the same way you can see steam rising off of a cold pond when the sunlight hits it in the morning.

Answer 4

Coz the process is called evaporation, not BOILING! The difference between the two processes is that though boiling requires a temp. of 100 degree Celsius, evaporation can take place at a much lower temp.
For example, when we spill some water on the backyard tiles on a sunny day, we observe that the water soon disappears due to evaporation. But try and imagine, is the temp. outside 100 degrees or so? No. It's atmost 48 degrees.

Answer 5

Not only sea water but water of the tap evaporates at temperatures lower than 100C.

Make the following experiment . Put water in a baker with a large area and let it stand one day. You will see that the water evaporates the volume will decrease.

This is due to thermal agitation of molecules of water. Some molecules passes through the interface water air and do not return to the liquid phase

Answer 6

What you need to know is the difference between heat and temperature.

Heat is a form of energy. Molecules can hold heat energy. The heat causes the molecules to vibrate. The more heat energy the faster the molecules will vibrate.

So in any substance molecules contain different amounts of heat energy. Temperature is a measurement of the AVERAGE heat energy of the molecules of a substance.

So if you were swimming in the ocean, your body temperature would be higher than the temperature of the water. However, the ocean would hold more heat energy than your body because it's much much larger.

The boiling point of a liquid it the temperature where all of the molucules will have enough heat energy to become gas.
When the sun heats water the molcules on the surface recieve most heat. These molecules will gain enough energy on their own to become vapor but the temperature of the liquid will still be low.

Answer 7

The tempature is just one factor for seawater. Seawater is basically a suspension of sodium and H2O. The evaporation rate is slowed by the amount of other minerals in the water. Once water binds to them, it becomes heavy enough to remain without evaporation occurring.

Best Regards,

Eric

Answer 8

Air temperature is one factor in evaporation, however the dryness of the air is another, this also causes evaporation.

Answer 9

At ANY temperature, water has a "vapor pressure".
That means that at that temperature there will be a certain equilibrium between water vapor in the atmosphere and water.
Even ice will lose mass to vapor in sufficiently dry air.

Answer 10

You have use water treatment like hot water flowing in the pipes . Pipes are open in atmosphere . Atmosphere air reduces the water temperature.