why does boiling water evaporate in cold
For a good chunk of North America right now it s pretty damn cold. P Winter has come with a vengence so far for most of North America and for many people it has meant everything from tragic and catastrophic ice storms, huge snowfalls and general unpleasantry. Being ever the optimist, I decided that there is also the opportunity for fun and learning so last night as the temperature outside my home just east of Toronto, ON dipped down to about -20 Degrees Celcius (-3 F), I gathered my kids and told them we were going to run a science experiment. Over the years I ve occasionally seen demonstrations of how hot water can evaporate when thrown into very cold and dry air. P I had never tried it before myself but thought it would be as good a time as any. P So I boiled some water into a kettle, grabbed my video camera and the kids, then headed outside to see what would happen. I actually first posted this video on my facebook profile and the feedback was fast and furious. P
and it has already been shared about 100 times. SO WHAT S THE SCIENTIFIC EXPLANATION BEHIND THIS? P I was curious myself so I searched online and found a variety of explanations, the best of which came from a website called. P I ve basically copied their answer below: Evaporation plays a key role in this fun phenomenon. Evaporation is the transition of water from the liquid phase to the gas phase.
The rate of evapor ation depends on the temperature difference between the water and the air, and evaporation is more rapid in low humidity. Hot water is closer than cold water to evaporating, so your cup of near-boiling water is already close to becoming a vapor. By dispersing the liquid water into a collection of liquid water droplets, youve increased its surface area, which also speeds evaporation. The combination of hot water, cold, dry air, and high surface area causes most of the tossed near-boiling water to evaporate before it hits the ground, and the tiny droplets that dont evaporate will freeze into ice crystals while still in the air. If the water is not hot enough, evaporation will be slower. Instead of evaporating, the liquid will hit the ground first, and then freeze. If you re suffering from the cold, why not add some fun into the situation by attempting this yourself. P. P Always disperse the water away from you and use a big sweeping motion to do so. P Keep kids a safe distance away, but don t worry if the evaporated water blows backwards. P It happened to us on one attempt we made but the resulting mist over our heads was actually quite harmless and fun. As with anything in life, winter is what we choose to make it out to be, and this is one example of how winter can be just as fun as any other time of the year. It s freezing cold outside and you decide to take a cup of boiling water outside and throw it into the air.
PInstead of falling to the ground and searing a hole in the already-fallen snow Boom! It magically turns into snow! Have you everPseen this happen before? PIn recent years, this has become all the rage to videotape, particularly in regions that aren t used to such extreme temperatures. These videos go viral every winter when some bored soul sitting in the confines of a heated room gets the crazy idea of recording this bizarre experiment and sharing it on social media. However,Phave you every wondered why water at its boiling temperature can miraculously convert into snow in the blink of an eye? Exactly I had the same reaction. It s pretty hard to believe. But wait a minute! Can you do this anytime and anywhere when it s freezing cold outside? Not exactly. PThis transformation doesn t really work that way. There are certain conditions that need to be fulfilled in order to create snow from boiling water. Two conditions to be precise, and if they re both present, then you should be able to create snow from boiling water: 2) The outside temperature should be very cold, in the range of (-20 ) Wow that is awfully cold! When boiled water is thrown into air at such a cold temperature, it instantly turns into snow and simply drifts away. However,Pbe careful when trying out this cool-looking phenomenon, and don t throw the hot water straight up or onto other people. `C, or below 0`F ).
In other words, if these conditions are not satisfied, you may end up hurting yourself or others with the boiling water. This is such an unbelievable phenomenon, however, thatPpeople go outside in these freezing temperatures, stand in the snow, and throw water to make even more snow! What can I say! HumansPcan be very difficult creatures to understand. C. Why Does Boiling Water Turn Into Snow? Boiling water is closer to the point of evaporation than cold water. Cold air is very dense, which makes its capacity to hold water vapor molecules very low. Therefore, when hot water is thrown into extremely cold air, the smallest droplets are able to cool and evaporate in a dramatic cloud before they reach the ground. In reality, this water isn t actually converting into snow; rather,Pthe water rapidly evaporates into vapor that immediately condenses into a cloud. Whatever it is, it still looks like snow, so it s pretty cool! As it turns out, sub-zero temperatures aren t that bad. You can t make real snow (although you probably alreadyPhave plenty to play withPin the winter), but making huge clouds of vapor from hot water does look pretty cool. Just remember to be careful! Dont burn yourself or anyonePelse while trying toPmake the next viral video!
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