buying compressed gas

[Beef_Bourito]

is it possible to buy a specific mix of two different gases under pressure in one bottle? I would like a mix of one part methane 4 parts nitrous oxide(N2O) and another container of one part propane 10 parts N2O compressed to a certain pressure. Does anyone know where I could buy this and how expensive it would be?

[infamous]

Originally Posted by Beef_Bourito

is it possible to buy a specific mix of two different gases under pressure in one bottle? I would like a mix of one part methane 4 parts nitrous oxide(N2O) and another container of one part propane 10 parts N2O compressed to a certain pressure. Does anyone know where I could buy this and how expensive it would be?

I suggest that you not mix these gases under pressure, the subsequent explosion might injure someone. You see, methane a hydrocarbon mixed under sufficient pressure with the oxidizing agent nitrous oxide will ignite and produce a violent explosion. My question to you would be; what purpose would one achieve by mixing these gases underpressure in a single container?

[Biochemist]

Originally Posted by Beef_Bourito

I would like a mix of one part methane 4 parts nitrous oxide(N2O) and another container of one part propane 10 parts N2O compressed to a certain pressure.

I agree with Infamous. This mixture is commonly used as rocket fuel for hobbyists. If anyone actually mixed these two gasses together under pressure, I would HOPE they would lose their license to sell chemicals.

A standard technique/use for this mixture is:

Prepare a mixture of 10-mL CH4 and 40-mL N2O in a single syringe. Displace water in a water-filled cut-off disposable pipet. Slip the pipet over a piezoelectric sparker, replace some water into the stem and ignite the gas mixture with a spark. The rocket will fly over 5 m. An especially bright light accompanies the detonation. The reaction is:

4 N2O(g) + CH4(g)----> 4 N2(g) + 2 H2O(g) + 2 CO2(g) DH = -1131 kJ

Keep in mind this reaction is for 50ml of uncompressed gas. 50 liters might be significantly more difficult to manage. The notion of flying shrapnel ought to cross your mind.

[infamous]

Originally Posted by Biochemist

I agree with Infamous. This mixture is commonly used as rocket fuel for hobbyists. If anyone actually mixed these two gasses together under pressure, I would HOPE they would lose their license to sell chemicals.

A standard technique/use for this mixture is: Keep in mind this reaction is for 50ml of uncompressed gas. 50 liters might be significantly more difficult to manage. The notion of flying shrapnel ought to cross your mind.

Say, Good work Biochemist; You really are a Biochemist aren't you. When I was in college, chemistry was one of my favorite subjects. I was always amazed to see reactions resulting in predicted outcomes. Chemistry has been, and still is one of the most usefull and benefical technologies humankind has developed.

[Biochemist]

Originally Posted by infamous

Say, Good work Biochemist; You really are a Biochemist aren't you. When I was in college, chemistry was one of my favorite subjects. I was always amazed to see reactions resulting in predicted outcomes. Chemistry has been, and still is one of the most usefull and benefical technologies humankind has developed.

I appreciate the complement IF, but this is actually general chem, not bio.

In college, my favorite explosives involved iodine crystals. For the health of the readers, I will keep my proprietary production techniques to myself. But suffice it to say that I found a pretty high-yield process, and I have the Emergency Room records to prove it.

[infamous]

Originally Posted by Biochemist

I appreciate the complement IF, but this is actually general chem, not bio.

In college, my favorite explosives involved iodine crystals. For the health of the readers, I will keep my proprietary production techniques to myself. But suffice it to say that I found a pretty high-yield process, and I have the Emergency Room records to prove it.

I thought reactions involving any of the hydrocarbons would be classed as Bio. Anyway my first love is Physics.

[Biochemist]

Originally Posted by infamous

I thought reactions involving any of the hydrocarbons would be classed as Bio. Anyway my first love is Physics.

Ah. Well usually discussion of carbon-containing stuff is organic chemistry. To be biochem, it has to be stuff in a biological system (most of which is carbon-containing as well)

[C1ay]

Originally Posted by Beef_Bourito

is it possible to buy a specific mix of two different gases under pressure in one bottle? I would like a mix of one part methane 4 parts nitrous oxide(N2O) and another container of one part propane 10 parts N2O compressed to a certain pressure. Does anyone know where I could buy this and how expensive it would be?

Transportation of such a mixture would be illegal in the U.S. because of the hazmat regulations. Where are you? If you're in the U.S. how do you think someone could get this to you even if such an unsafe mixture was available?

BTW, what is it you want to use this mixture for?

[infamous]

Originally Posted by Biochemist

Ah. Well usually discussion of carbon-containing stuff is organic chemistry. To be biochem, it has to be stuff in a biological system (most of which is carbon-containing as well)

I see; carbon based chemistry would just be organic chemistry, right? Then if I understand, Biochemistry would involve living tissue. Is this a proper defination?

[Biochemist]

Originally Posted by infamous

I see; carbon based chemistry would just be organic chemistry, right? Then if I understand, Biochemistry would involve living tissue. Is this a proper defination?

Yes, although it doesn't have to be actual tissue. You can set up biological enzyme systems in test tubes, and that still counts as Biochem. I am sure I could think of something that would gray the boundary between organic and biochemistry.