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It's because on a hot day, the window is not cold enough to condense the water in the breath that is breathed on it. The solubility of a liquid in a gas is temperature dependent, so the water in breath which is a gas mixture saturated with moisture precipitates out when it hits a cold pane of glass. Similarly when you open an oven the moisture from the food cooking lets a steam escape that will fog up your glasses.

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17y ago

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When you breathe on a window what is it called?

It would be called condensation. The moisture in your breath "condenses" into a fog on the surface in front of you.


What does the air you breathe out contain?

mostly the same as input, but less oxygen and more mucus


What happens when your headlights shine into fog?

the light doesnt go through the fog


Is condensation the change of a liquid into a gas?

No,its a gas to a liquid. Example:when its cold outside and you breathe on a window and fog appears you wipe the fog off the window and it will be wet just like a liquid hope that helped :) sinceraly,zahria


What causes the fog when you breathe in the cold?

When you breathe in cold air, the warm moisture from your lungs and respiratory system condenses into tiny water droplets. These droplets are then visible as a fog or mist when you exhale.


What substannce makes a window fog up?

It is the moisture leaking through the seal of the window. The moisture collects between the window panes and makes the glass fog up. I do not know how i can fix it. I think you just have to buy an all new window.


What is a sentence using the word breathe?

My breath was misty in the cold winter air. When I am angry, I take a deep breath and it helps me feel much more calm. Take a deep breath here, as you have nearly finished!


What actors and actresses appeared in Days of the Fog - 2011?

The cast of Days of the Fog - 2011 includes: Ismaila Ikani Sule


Why do car windows fog up?

well it could be because of the heat. if its cold out and you have the heat on in the car, then you will get hot and that will cause the window to fog.


Is there a mirror that doesnt fog so I can shave in the shower?

Hundreds of manufacturers produce and sell fog-resistant mirrors which can sometimes even be found in supermarkets.


What is the City with most fog?

The city that has the most annual fog in the US is New Orleans, Louisiana. It has an average of about 200 days of fog annually. The next foggiest city is Jacksonville, Florida with about 198 days of fog. The least foggiest is Las Vegas, Nevada with only 5 days of fog.


How to turn on fog lights on a Sport Trac?

Turn on the fog lights by pressing the fog light button under the rear window button. when you press it a green light will come on leting you know its been turned on.