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How do you get steam out from mouth in cold winter?

Date: 10 Jan 2016   Posted By: Avi     Group: Science and Technology    Category: Science   

Recently I observed that as soon as I get out in the cold, vapors or steam or winter breath comes out from the mouth. I researched and found that it is because of condensation. But after sometime the steam quantity reduces and vapors don't come out. Scientifically under what situation does steam stop coming out ? Also is it better not to open mouth in winter when your are outside? Does it save your energy?
Awaiting responses from experts.

Wondering about why steam comes out from the mouth in winter? Check out responses from experts here.

Author: Bhaskar Borah    12 Jan 2016      Member Level: Silver     Points : 5  (Rs 5)    Voting Score: 0

Seeing your breath when you're outside lets you know that it is clearly crisp! The reason you can see your breath is a result of the water vapor in your breath. When you breathe in, water vapor is added to the air by your lungs, nearby the carbon dioxide from your body. Exactly when your breath leaves your warm body and communicates with the frosty air, it is immediately cooled. As it cools, the water vapor, which you can't see, assembles into minor water dots, all that much like the drops in a cloud or fog. The particles are little to the point that they can't be recognized by the eye either, in any case we see the light reflected off them much like smoke from a cigarette. So we really don't see our "breath" by any methods, in any case we see the merged water vapor dabs in our breath. exactly when the temperature get relative, i.e. the temperature of the body and the outside you can't see the vapors.

While breathing is imperative for living being, I think there is nothing to spare essentialness.

Author: Kailash Kumar    12 Jan 2016      Member Level: Platinum     Points : 3  (Rs 3)    Voting Score: 0

The exhaled air contains moisture and it is at the body temperature of the individual concerned. When it comes out of the mouth, it is saturated with the moisture or water vapors which gets condensed as the temperature is lower than the body temperature in the surroundings. The condensed water vapors gives the exhaled air a cloudy appearance. The more the difference between the body temperature and outside temperature, more condensation will take place. In case the temperature difference is no longer there, condensation will not take place.

Author: Mahesh    13 Jan 2016      Member Level: Gold     Points : 3  (Rs 3)    Voting Score: 0

Our body always tries to maintain the temperature while we are out. Also if you are wearing anything warm then body tries to adjust the temperature with it. By doing this you may feel that you're keeping the heat within.

When you throw some exhaled air out then that heat gets into the cold air showing you steam. In reality it is just exchange of heat from warm body to cold air. This is why the effect is visible in the winter or cold region. You may not feel the effect during rainy season or summer.

Author: Partha Kansabanik    13 Jan 2016      Member Level: Diamond     Points : 2  (Rs 2)    Voting Score: 0

When a person exhales air, the heat gets into the cold environment forming steam. In actuality, it is only exchange/ transfer of heat from warm body to colder environment. For this reason, the effect is visible during the winter or in cold regions. This phenomenon is not witnessed during summer or in rainy season.

Author: Karthikeyan    14 Jan 2016      Member Level: Gold     Points : 3  (Rs 3)    Voting Score: 0


I hope you got the scientific reason for the steam coming out from mouth during winter in above reasons. I thought to give answers to your other two questions.

Also is it better not to open mouth in winter when your are outside?

Opening mouth in outside during winter won't have any serious effects on your body unless you have serious respiratory diseases. You can enjoy your winter by opening your mouth wide open.

Does it save your energy?
It is just like inhaling and exhaling. It has nothing to do with saving your energy.

Author: T.Krishnamoorthy    15 Jan 2016      Member Level: Gold     Points : 3  (Rs 3)    Voting Score: 0

During winter season or cold season hairs on our body becomes stiff and blocks the pores on the skin surface. By doing so, it reduces energy loss from the body to the surroundings. In that time we also used to wear woolen cloths that will also heats-up our body. Hence, by this mechanism the body heat will be certainly higher than the surroundings. When you exhale, the hot air comes out from the lungs heats-up the tiny water droplets present in the atmosphere. So it starts condensation. This is the reason why it looks steam coming out of our mouth or nose while exhaling.

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