A good 15 gal keg pressure for regular American beers served at typical temps 32-35 F is 8-10 psi. For a pony keg, try 4 lbs and see how fast the beers is pushed out. I know 8 lbs is too high for pony kegs (7.5 gals)
It depends on the style of beer, and on the temperature the beer will be carbonated at (not necessarily stored at). The amount of CO2 desired is expressed in volumes of CO2 where 1 volume = 1 gram of CO2 dissolved in 1 liter of beer. Desired volumes can range from less than 1 for higher gravity and especially English beers, to maybe 4.5 for a fizzy lambic.
This calculator- http://www.tastybrew.com/calculators/carbonation.html
can help you get the right carbonation for your style and setup.
The CO2 tank is the propellant for the marker. It is very high pressure and is what physically shoots the paintballs out of the barrel, it is also what moves all of the internal parts, allowing the marker to fire and reload.
The top of a CO2 canister isn't very thick. It will take about a half a pound of pressure to break through the top.
On a paintball gun C02, or High pressure air is necessary. It is compressed air that, when the trigger is pulled and the marker fires, propels the paintball out of the barrel.
No, the vapor pressure of CO2 would be higher. Think of it like this, if you compress the molecules in gas enough, they will be close enough together to form a liquid. Both CO2 and water can exist as liquids and gas. At atmospheric pressure (14.7psi) or normal everyday pressure, water is a liquid and CO2 is a gas. This means that 14.7psi is not enough pressure to compress CO2 into the liquid state. Therefore, CO2 has a higher vapor pressure because it requires more pressure to become a liquid. Looking at it from the other side, if you had extremely high pressure where CO2 and water were both liquids and you started lowering the pressure, CO2 would become a vapor first once you went below a certain high pressure, and water wouldn't become a gas until you went well below atmospheric pressure.
1 mole CO2 has about 44 grams, so half a mole of CO2 equals 22 grams
The partial pressure of SO4 in a bottle of NO2, CO2, and SO2, is 7.32 atm.
You will need to use a carbon scrubber device to capture co2 under atmospheric pressure.
CO2 tanks are not rated of the amount of pressure they put out, but the size of the tank and how much weight of CO2 it holds. This is because CO2 pressure changes rapidly with temperature. It is on average about 1000 psi.
Mainly Venus which has a huge amount of CO2 and suffers from extreme global warming as a result, with temperatures of 400-500 degrees C. The atmosphere on venus is 95% CO2 and the pressure at the surface is more than half a ton per square inch.
CO2 extinguisher have a max test pressure of 20,700 kPa. Max design operating pressure of 18,570 kPa. The min burst pressure of a cylinder must be at least 2.7 times the max operating pressure. So the burst pressure of a CO2 fire extinguisher will be at least 50,139 kPa
Carbon di-oxide
No, paintball co2 is much higher pressure.