Answer to Question #158537 in General Chemistry for james

Question

i have come up empty in trying to figure out a certain issue ..

I am doing a project with air cylinders and need a calculation based on how much compressed air would be in a cylinder thats 2 x 6 inches and yes i searched google and YouTube and there is mention on these but it appears different folks have different formulas and different conclusions... i am startled because of the lack of information on this, i wouldn't assume this would be THAT elusive.. most answers I got was - P1 x v1 = p2 x v2 formula and that seems something i will learn at one point in time after i learn the basics but here is what i got so far if i may-

 

 

Pressure times volume divided by atmospheric or : P x V / 14.7  .. seem ok at first when i calculate a pressure of 40 psi times the volume of my cylinder being 18.85 Cu inch then divided by 14.7 atm

which comes to 51.3 Cu inch …

but if i change 40 psi to 10 psi things get hairy... 10 (psi) x 18.85 (volume) / 14.7 (atm) = 12.82 Cu inch.. but this is less air than regular atmospheric pressure .. so the formula must be faulty

 

thanks for considering this if at all

Answer 1

The volume of a cylinder is equal to the product of the base area by the height:

V=S x h = 2 x 2.54 x 6 x 2.54 = 77,4192 cm^3