pressure in a soda bottle?

Question

How much pressure is there in a normal plastic 2L bottle of soda that has not been shaken or opened?

Answer 1

et's say that the soda was carbonated to 3.0 volumes of CO2 and it has been sitting in your refrigerator so it's around 40 degrees F. The pressure inside will be roughly 17 psig (pounds per square inch, gauge) above atmospheric pressure. If you let the soda warm up on the counter so its temperature increases to 70 F or so, the pressure inside the can will have increased to about 36 psig.

Answer 2

I'm Armed and Carbonated

Typical soft drinks are pressurized to about 300 kPa. If the surface area of the cap is 3 square cm, the cap is under about 90 Newtons of force, or about 20 pounds. If we assume that some manufacturing error resulted in the cap suddenly becoming loose after a vigorous shaking of the soda at room temperature, this 90 Newtons would act on the cap for as long as the cap blocks the exit path of the gas: about 2 cm. If that 90 Newtons accelerates the cap for 2 cm, the energy transferred to the cap would be only 1.8 Joules. Most accidental cap accidents would be under less-than-ideal launch conditions, so I would be surprised if caps blew off with more than 1 Joule of energy.

Answer 3

So much pressure!!

Have you seen the stress that soda is under lately? I think I saw 7-Up on a bridge thinking about jumping...

It is hard being soda.

If that isn't the type of pressure you were referring to, I'd say look at the guy's answer above mine.