Chemistry Question About SprayPaint

UNIquelyCanadian · 2006-07-29, 04:16 PM

Can anyone with some chemistry knowledge help me out?

I took a half full plastic bottle of water and sprayed some spray-paint into it then closed the lid. After mixing the paint propellant with the water, the bottle imploded leaving next to no air in the bottle!

I tried it several times, for it to work you have to shake the bottle and have some water in it. It works spraying the paint or just spraying the propellant.

Why does this happen?

phlegm · 2006-07-29, 04:51 PM

I don't know about the specific compounds involved, but the propellant must combine with air to form a substance that readily dissolves in water.

dudewithasock · 2006-07-29, 10:30 PM

Did you put any pictures of it up on your macro-photography site?

UNIquelyCanadian · 2006-07-30, 03:46 AM

Quote:

Originally Posted by dudewithasock

Did you put any pictures of it up on your macro-photography site?

I discovered it at work so I couldn't take any photos. If you have any spray paint you could try it and see if it works with a different brand of paint?

Does anyone somehow somewhere have somewhat of an idea about something to do with the reaction?

iridemymuni · 2006-07-30, 04:00 AM

how much paint in there?

iridemymuni · 2006-07-30, 04:25 AM

i went down and tried it, i also videoed it. but nothing happened, at all.

tomtrevor · 2006-07-30, 04:27 AM

maybe he used a different spray paint which had another type of chemical in it.

iridemymuni · 2006-07-30, 04:38 AM

i used two different types of spray paint. i thought the propellant was always hydrocarbon?

TheObieOne3226 · 2006-07-30, 08:31 AM

You may have just forced all of the air out of the water bottle. Then the propellant (which may be less dense than air) was absorbed by the water or something, leaving a vacuum. Implosion.

jake_amos · 2006-07-30, 08:35 AM

yes that would make perfect sense if i knew what you were talking about

Jim_Rob · 2006-07-31, 01:34 AM

Congratulations, you've just demonstrated Henry's Law.

http://en.wikipedia.org/wiki/Henry%27s_law

The solvent and aerosol propellant gas must be soluble in water. When you spray the paint into the bottle, the vapors displace air. Then when you cap the bottle and shake it, the vapors equilibrate with the aqueous phase according to Henry's Law. If they are very soluble then the partial pressure of the solute above the solution will be quite small, thus the bottle collaspes. No real reaction necessary.

(Every good explanation has to use the word 'thus')

THE dave · 2006-07-31, 03:00 AM

my spray paint failed...

UNIquelyCanadian · 2006-07-31, 08:23 AM

Quote:

Originally Posted by Jim_Rob

Congratulations, you've just demonstrated Henry's Law.

http://en.wikipedia.org/wiki/Henry%27s_law

The solvent and aerosol propellant gas must be soluble in water. When you spray the paint into the bottle, the vapors displace air. Then when you cap the bottle and shake it, the vapors equilibrate with the aqueous phase according to Henry's Law. If they are very soluble then the partial pressure of the solute above the solution will be quite small, thus the bottle collaspes. No real reaction necessary.

(Every good explanation has to use the word 'thus')

That would make sence, thus my search is reached it's end!

Thanks for your help.

tomtrevor · 2006-07-31, 09:06 AM

Quote:

Originally Posted by Jim_Rob

Congratulations, you've just demonstrated Henry's Law.

http://en.wikipedia.org/wiki/Henry%27s_law

The solvent and aerosol propellant gas must be soluble in water. When you spray the paint into the bottle, the vapors displace air. Then when you cap the bottle and shake it, the vapors equilibrate with the aqueous phase according to Henry's Law. If they are very soluble then the partial pressure of the solute above the solution will be quite small, thus the bottle collaspes. No real reaction necessary.

(Every good explanation has to use the word 'thus')

....yea that sounds about right

2006-07-29, 04:16 PM	#1
UNIquelyCanadian Static Long Jump ~ 2.0 Meters Join Date: Aug 2004 Location: Cochrane, Ontario, Canada Age: 24 Posts: 1,174	Chemistry Question About SprayPaint Can anyone with some chemistry knowledge help me out? I took a half full plastic bottle of water and sprayed some spray-paint into it then closed the lid. After mixing the paint propellant with the water, the bottle imploded leaving next to no air in the bottle! I tried it several times, for it to work you have to shake the bottle and have some water in it. It works spraying the paint or just spraying the propellant. Why does this happen? __________________ ~Cameron New Photos: www.camerondonaldson.com “When someone tells you there is no such thing as truth, they are asking you not to believe them. So don’t.” - Dr. Roger Scruton

2006-07-29, 04:51 PM	#2
phlegm Registered User Join Date: Oct 2004 Location: East Bay, California Age: 37 Posts: 2,505	I don't know about the specific compounds involved, but the propellant must combine with air to form a substance that readily dissolves in water. Last edited by phlegm; 2006-07-29 at 04:51 PM.

2006-07-30, 04:00 AM	#5
iridemymuni i just dribbled Join Date: Mar 2006 Location: Brisbane, Austraila Age: 23 Posts: 3,614	how much paint in there? __________________ maker of the happy birthday threads _________ Just put the new uni together in the driveway stopped to move the car and ran over the uni. Felt like putting my head under the tire. - JustOneWheel

2006-07-30, 04:25 AM	#6
iridemymuni i just dribbled Join Date: Mar 2006 Location: Brisbane, Austraila Age: 23 Posts: 3,614	i went down and tried it, i also videoed it. but nothing happened, at all. __________________ maker of the happy birthday threads _________ Just put the new uni together in the driveway stopped to move the car and ran over the uni. Felt like putting my head under the tire. - JustOneWheel

2006-07-30, 04:27 AM	#7
tomtrevor Registered User Join Date: Apr 2006 Location: Brisbane Australia Age: 23 Posts: 3,442	maybe he used a different spray paint which had another type of chemical in it. __________________ 01010100 01101111 01101101 00100000 0101010001110010 01100101 01110110 01101111 01110010 G o o g l i n g s ! ..... T o m's Ra n d o m L i n k a g e s

2006-07-30, 04:38 AM	#8
iridemymuni i just dribbled Join Date: Mar 2006 Location: Brisbane, Austraila Age: 23 Posts: 3,614	i used two different types of spray paint. i thought the propellant was always hydrocarbon? __________________ maker of the happy birthday threads _________ Just put the new uni together in the driveway stopped to move the car and ran over the uni. Felt like putting my head under the tire. - JustOneWheel

2006-07-30, 08:31 AM	#9
TheObieOne3226 ***** Member Join Date: Nov 2003 Location: Philadelphia Age: 26 Posts: 3,441	You may have just forced all of the air out of the water bottle. Then the propellant (which may be less dense than air) was absorbed by the water or something, leaving a vacuum. Implosion. __________________ SWAT Gallery SWAT webpage Arrow Racing Sixsixone "Obie is definately a trend setter, I got in to unicycling because of him, and came here because of him" - KJ-52 "try not to annoy the great Obie, for he is better than us." - Murde Mental Disclaimer: The above message was not intended to offend anyone. If you are offended I can take no responsibility for my actions because I don't feel like it. Also you are reading an internet newsgroup where not everyone will share your same views and beliefs, be able to take criticism and post/read threads at your own risk.

2006-07-31, 01:34 AM	#11
Jim_Rob Old Man Join Date: Apr 2003 Location: Boulder, Colorado Posts: 314	Congratulations, you've just demonstrated Henry's Law. http://en.wikipedia.org/wiki/Henry%27s_law The solvent and aerosol propellant gas must be soluble in water. When you spray the paint into the bottle, the vapors displace air. Then when you cap the bottle and shake it, the vapors equilibrate with the aqueous phase according to Henry's Law. If they are very soluble then the partial pressure of the solute above the solution will be quite small, thus the bottle collaspes. No real reaction necessary. (Every good explanation has to use the word 'thus') __________________ TTFN- JR Keep your Gubmint hands off my Medicare! In theory, there's no difference between Theory and Practice In practice, there is.

2006-07-31, 03:00 AM	#12
THE dave Walrus Join Date: Feb 2005 Location: Whitefish, Montana Age: 24 Posts: 778	my spray paint failed... __________________ Toast dave psychoteledave2(at)hotmail(dot)com Team Yams Last edited by James_Potter on 2005-10-5 at 3:58pm Last edited by Unitik908 on 2005-09-06 at 04:12 AM Last edited by forrestunifreak on 2005-09-09 at 03:51 AM

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