Exhaling water vapour??

[Greg__B]

We've all watched the news pieces and read the quotes talking about vaping that state all we exhale is "harmless water vapour". So that's basically my question. I have no doubt in my mind that what we exhale is harmless (at least by comparison to the 2nd hand smoke we all used to pollute the air with), but given that we're inhaling PG or VG or both, how does that supposedly transform into H2O on the exhale? I'm no chemist but I can't seem to make sense of it myself.


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[Letharian]

You should check DC2's thread Vaping Myths: Are we exhaling water vapor?

 

[Butters78]

I'm exhaling the souls of the non believers.

 

[bazmonkey]

Have you ever noticed the "DO NOT EAT -- DESICCANT" packets in bags of beef jerky or dried fruit? It's filled with silica gel, which is "hydroscopic": it absorbs water around it. It soaks up the moisture in the bag and helps keep the jerky dry and fresh.

Glycerin and propylene glycol (e-liquid base) are also hydroscopic. A glass of it will actually slowly soak moisture out of the air. When that is vaporized, the little particles soak some of the water from the air (and your lungs), which condense around it. The visible vapor you see when you exhale is indeed water vapor. There is PG and VG in it, too, but the larger, visible component is water vapor.

You may notice that the temperature and humidity of the room/environment affects how the vapor looks. You'll see more vapor in cold, humid environments.

So I guess the technical answer is that the exhaled vapor is a combination of PG, VG, and water vapor. The visible part, though, is water.

 

[Greg__B]

Thanks for the explanations! Very interesting.


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[wv2win]

PG is used in hosptial ventilation systems as an antibacterial agent.

 

[Barbara21]

Have you ever noticed the "DO NOT EAT -- DESICCANT" packets in bags of beef jerky or dried fruit? It's filled with silica gel, which is "hydroscopic": it absorbs water around it. It soaks up the moisture in the bag and helps keep the jerky dry and fresh.

Glycerin and propylene glycol (e-liquid base) are also hydroscopic. A glass of it will actually slowly soak moisture out of the air. When that is vaporized, the little particles soak some of the water from the air (and your lungs), which condense around it. The visible vapor you see when you exhale is indeed water vapor. There is PG and VG in it, too, but the larger, visible component is water vapor.

You may notice that the temperature and humidity of the room/environment affects how the vapor looks. You'll see more vapor in cold, humid environments.

So I guess the technical answer is that the exhaled vapor is a combination of PG, VG, and water vapor. The visible part, though, is water.

Thank you for that explanation.

 

[soba1]

PG is used in hosptial ventilation systems as an antibacterial agent.

Now that is quite interesting

 

[Hotwire]

the little particles soak some of the water from the air (and your lungs), which condense around it.

Jebub Krisp, really, it's taking water out of my lungs?

What kind of damage could that do, sounds pretty effed up to me... I know smoking is bad too, but dehydrating my lungs...?

 

[YKruss]

Jebub Krisp, really, it's taking water out of my lungs?

What kind of damage could that do, sounds pretty effed up to me... I know smoking is bad too, but dehydrating my lungs...?

Are you serious? Where is a smiley?

 

[bazmonkey]

Jebub Krisp, really, it's taking water out of my lungs?

What kind of damage could that do, sounds pretty effed up to me... I know smoking is bad too, but dehydrating my lungs...?

I think it's taking a lot less moisture out of you than you think. You can see the little bit of left over vapor in a tank or clearo after you take a draw. It's already "vapor-ey" by the time it gets to your mouth for the most part. Most of that moisture is from the air you suck past it on the way in.

 

[Glen Snyder]

I'm exhaling the souls of the non believers.

Funny, I figured you exhaled lotion

 

[Greg__B]

Have you ever noticed the "DO NOT EAT -- DESICCANT" packets in bags of beef jerky or dried fruit? It's filled with silica gel, which is "hydroscopic": it absorbs water around it. It soaks up the moisture in the bag and helps keep the jerky dry and fresh.

Glycerin and propylene glycol (e-liquid base) are also hydroscopic. A glass of it will actually slowly soak moisture out of the air. When that is vaporized, the little particles soak some of the water from the air (and your lungs), which condense around it. The visible vapor you see when you exhale is indeed water vapor. There is PG and VG in it, too, but the larger, visible component is water vapor.

You may notice that the temperature and humidity of the room/environment affects how the vapor looks. You'll see more vapor in cold, humid environments.

So I guess the technical answer is that the exhaled vapor is a combination of PG, VG, and water vapor. The visible part, though, is water.

I see what you mean about seeing more vapour when it's humid. It was 40 degrees with the humidex here in Ottawa today and the vapour I blew out when I went outside for break was much more noticeable and lingering then when I was inside.


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[Hotwire]

I think it's taking a lot less moisture out of you than you think. You can see the little bit of left over vapor in a tank or clearo after you take a draw. It's already "vapor-ey" by the time it gets to your mouth for the most part. Most of that moisture is from the air you suck past it on the way in.

Cheers for that!