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because it condenses into water when your hot breath is exhaled onto a cold object.

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13y ago

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Why exhaled air has more water vapour?

No. The exhaled air contents more water vapour. The exhaled air is almost saturated with water vapour.


Why does moist in the mirror after you blow it?

The moist you are talking about is nothing but the water vapour that one releases, every time one exhales. As already know, when we breathe in, the air that enters gets humidified as it passes through the nasal passages. Hence, the air exhaled, or breathed out, contains considerable percentage of water vapour. Now, this water vapour exhaled out, initially is at body temperature, i.e., 37.5*C. On coming out through exhalation, the vapour soon cools down and condenses on the nearby mirror glass surface. Hence, the moist is seen.


Why does water vapour have a larger volume than the original amount of water?

I don't know, you tell me...


How do you know that water vapour is present in the air?

it will often be in the form of steam so it will be thicker and heavier


Is water vapour passing out of the stomata of the leaf an example of excretion?

No it is not I don't know what it is but it surely isn't that! Your Welcome!


How do you know that air exhaled by us contain watervapour?

We can perform a very simple activity to prove it practically. Hold a glass in front of your mouth on a cold day and exhale. You'll find that tiny liquid water droplets will be visible on the surface of the glass. The water vapour condenses due to the cool temperature of the environment. This easily proves the question


How is water vapor generated?

Water vapour is most commonly know as a steam substance when water has started to boil and turn into a gas. Water vapour on a lake for example will rise into the atmosphere and start to condense into a cloud which will later on fall as a liquid (rain) when it is cool. This is called Changing State.


Does the planet Venus have any water if so what kinds?

Planet Venus might have water in it. If it does it is in the form of water vapour. If one of you know for sure that water exists or is not present on Venus please improve my answer.


How do you know ocean water contains salt?

I personally have tasted it.


What does exhaled air contain more of than inhaled air?

More Oxygen, because some of it is processed into Carbon Dioxide (CO2).


Is it safe to drink from a lake?

no because you don't know what does the water contains!!


What happens to water vapor to make rain drops in clouds?

Well, we know how water vapour forms, right? The water heats up to 100 degrees Celsius and evaporates. Then it rises up as high as possible. Once the vapour reaches a certain height, it's too cold for the vapour to stay in a gaseous state; therefore, it turns back to its previous state, water. It then becomes too heavy to stay in the sky, and falls down. Hope that helps, from PNE.