Oxygen consumption ?

***schford*** · 6th September 2006, 08:20

Allow me to translate for our American visitors...well a summary any way.

Funny limey humour taking piss out of ozzy guy

Ozzy guy recognisies stupid limey humour and is deliberatly OTT in techie nerd details for his responce.

heheheh

dteubner · 6th September 2006, 08:25

Quote: (Originally Posted by fubari)

Grams aren't so bad. Not part of the nitrox curriculum, but
perhaps the physics is sound? We both may need to go back
to Chemistry 101, Ccr_Ada ( I am sure that I do

).

I say that because I decided to try following Dave's math.
2.1 grams of oxygen = 32*1.5/22.4
Huh? Now I'm feeling dumb.
Let's add some units:
32?? * 1.5 L / 22.4 ??
This ( Image:Mole.gif - Wikipedia, the free encyclopedia) tells me
that the 22.4 comes from the molar volume of a gas at 1 ata.

So 22.4L of Oxygen at 1ata equals 1 mole.
One mole of oxygen weighs 16gm (15.9994 grams), yes?
So 1L of Oxygen at 1ata weighs 16gm/22.4L --> 0.7143gm
So 1.5L of Oxygen at 1ata weighs 1.5 * .7143gm --> 1.07gm ??
Why not 2.1gm like Dave got?
Ah Hah! This is O2, not just O, so it is really 2*1.07 gm --> 2.14gm.

That is where the 32 in "(32gm/mol) * 1.5L / (22.4L/mol)" came from.
The atomic weight of 2 * one oxygen atom, since we're talking O2.
e.g. 2 * 16 gm.
I thought I was going to be up all night trying to work that one out.
Close enough for me.
I'm going to bed now.

Quite.

UKSteve · 6th September 2006, 08:29

Quote: (Originally Posted by schford)

Allow me to translate for our American visitors...well a summary any way.

Funny limey humour taking piss out of ozzy guy

Ozzy guy recognisies stupid limey humour and is deliberatly OTT in techie nerd details for his responce.

heheheh

Now...THAT is what I call moderation....Babel Fish eat your heart out..

Time for a

I think!!!!

Steve

ccr_ada · 6th September 2006, 12:07

Quote: (Originally Posted by fubari)

Grams aren't so bad. Not part of the nitrox curriculum, but
perhaps the physics is sound? We both may need to go back
to Chemistry 101, Ccr_Ada ( I am sure that I do

).

I say that because I decided to try following Dave's math.
2.1 grams of oxygen = 32*1.5/22.4
Huh? Now I'm feeling dumb.
Let's add some units:
32?? * 1.5 L / 22.4 ??
This ( Image:Mole.gif - Wikipedia, the free encyclopedia) tells me
that the 22.4 comes from the molar volume of a gas at 1 ata.

So 22.4L of Oxygen at 1ata equals 1 mole.
One mole of oxygen weighs 16gm (15.9994 grams), yes?
So 1L of Oxygen at 1ata weighs 16gm/22.4L --> 0.7143gm
So 1.5L of Oxygen at 1ata weighs 1.5 * .7143gm --> 1.07gm ??
Why not 2.1gm like Dave got?
Ah Hah! This is O2, not just O, so it is really 2*1.07 gm --> 2.14gm.

That is where the 32 in "(32gm/mol) * 1.5L / (22.4L/mol)" came from.
The atomic weight of 2 * one oxygen atom, since we're talking O2.
e.g. 2 * 16 gm.
I thought I was going to be up all night trying to work that one out.
Close enough for me.
I'm going to bed now.

ok i get it now

i think !!

***EBT*** · 6th September 2006, 13:03

Quote: (Originally Posted by ccr_ada)

ok i get it now

i think !!

Are we wishing we'd put brain into neutral in time to stop our gob going into gear ?

See, theres always something to learn.... even if its only that wasabi isnt always the same strength... I need water quick!

PeteS · 27th September 2006, 03:52

Quote: (Originally Posted by EBT)

See, theres always something to learn.... even if its only that wasabi isnt always the same strength... I need water quick!

Wasabi. Isn't that Japanese for mild horseradish? Or are all Wasabi not created equal?

6th September 2006, 08:20	#11 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,562	Re: Oxygen consumption ? Allow me to translate for our American visitors...well a summary any way. Funny limey humour taking piss out of ozzy guy Ozzy guy recognisies stupid limey humour and is deliberatly OTT in techie nerd details for his responce. heheheh __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
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6th September 2006, 08:25	#12 (permalink)
dteubner Pedant Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Join Date: Mar 2005 Location: Adelaide, Australia Posts: 217	Re: Actually I'm trying to follow Dave's math... Quote: (Originally Posted by fubari) Grams aren't so bad. Not part of the nitrox curriculum, but perhaps the physics is sound? We both may need to go back to Chemistry 101, Ccr_Ada ( I am sure that I do ). I say that because I decided to try following Dave's math. 2.1 grams of oxygen = 321.5/22.4 Huh? Now I'm feeling dumb. Let's add some units: 32?? 1.5 L / 22.4 ?? This ( Image:Mole.gif - Wikipedia, the free encyclopedia) tells me that the 22.4 comes from the molar volume of a gas at 1 ata. So 22.4L of Oxygen at 1ata equals 1 mole. One mole of oxygen weighs 16gm (15.9994 grams), yes? So 1L of Oxygen at 1ata weighs 16gm/22.4L --> 0.7143gm So 1.5L of Oxygen at 1ata weighs 1.5 * .7143gm --> 1.07gm ?? Why not 2.1gm like Dave got? Ah Hah! This is O2, not just O, so it is really 21.07 gm --> 2.14gm. That* is where the 32 in "(32gm/mol) * 1.5L / (22.4L/mol)" came from. The atomic weight of 2 * one oxygen atom, since we're talking O2. e.g. 2 * 16 gm. I thought I was going to be up all night trying to work that one out. Close enough for me. I'm going to bed now. Quite.
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6th September 2006, 08:29	#13 (permalink)
UKSteve Steve Collard Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 598	Re: Oxygen consumption ? Quote: (Originally Posted by schford) Allow me to translate for our American visitors...well a summary any way. Funny limey humour taking piss out of ozzy guy Ozzy guy recognisies stupid limey humour and is deliberatly OTT in techie nerd details for his responce. heheheh Now...THAT is what I call moderation....Babel Fish eat your heart out.. Time for a I think!!!! Steve
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6th September 2006, 12:07	#14 (permalink)
ccr_ada 07971475781 Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2005 Location: uk sorry G.B. Posts: 221	Re: Actually I'm trying to follow Dave's math... Quote: (Originally Posted by fubari) Grams aren't so bad. Not part of the nitrox curriculum, but perhaps the physics is sound? We both may need to go back to Chemistry 101, Ccr_Ada ( I am sure that I do ). I say that because I decided to try following Dave's math. 2.1 grams of oxygen = 321.5/22.4 Huh? Now I'm feeling dumb. Let's add some units: 32?? 1.5 L / 22.4 ?? This ( Image:Mole.gif - Wikipedia, the free encyclopedia) tells me that the 22.4 comes from the molar volume of a gas at 1 ata. So 22.4L of Oxygen at 1ata equals 1 mole. One mole of oxygen weighs 16gm (15.9994 grams), yes? So 1L of Oxygen at 1ata weighs 16gm/22.4L --> 0.7143gm So 1.5L of Oxygen at 1ata weighs 1.5 * .7143gm --> 1.07gm ?? Why not 2.1gm like Dave got? Ah Hah! This is O2, not just O, so it is really 21.07 gm --> 2.14gm. That* is where the 32 in "(32gm/mol) * 1.5L / (22.4L/mol)" came from. The atomic weight of 2 * one oxygen atom, since we're talking O2. e.g. 2 * 16 gm. I thought I was going to be up all night trying to work that one out. Close enough for me. I'm going to bed now. ok i get it now i think !! __________________ 120M+ UK dive vid http://www.vimeo.com/157145 Dave who
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6th September 2006, 13:03	#15 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 1,970	Re: Actually I'm trying to follow Dave's math... Quote: (Originally Posted by ccr_ada) ok i get it now i think !! Are we wishing we'd put brain into neutral in time to stop our gob going into gear ? See, theres always something to learn.... even if its only that wasabi isnt always the same strength... I need water quick! __________________ Eagles May Soar, but weasels don't get sucked into jet engines! Rebreather World Terms of service Real diving t-shirts for real divers
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27th September 2006, 03:52	#16 (permalink)
PeteS Consent Issued! Current Rebreather/s: Inspiration Classic Inspiration Vision Other Rebreather/s: Join Date: Jun 2005 Location: New Zealand Posts: 533	Re: Actually I'm trying to follow Dave's math... Quote: (Originally Posted by EBT) See, theres always something to learn.... even if its only that wasabi isnt always the same strength... I need water quick! Wasabi. Isn't that Japanese for mild horseradish? Or are all Wasabi not created equal? __________________ Pete S. http://www.steggle.co.nz Every silver lining has a cloud
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