Author	[Modern View]
Terry G 10-30-2012 13:21:28 69.29.135.251 Report to Moderator	Is there a formula that would calculate how many cubic feet of natural gas would be in a gallon size tank at a certain pressure and temperature. For example 1 gallon tank, 2400 psi pressure at a temperature of 60F. [Reply]   [No Email]
JMOR 10-31-2012 12:49:17 72.181.173.171 Report to Moderator	Re: Compressed Gas in reply to MSM, 10-30-2012 13:21:28   Quoting Removed, click Modern View to seeIt just looked to me like they were saying that pv/t didn't apply at pressures over 2 atmospheres????? Wondered why & if so, then what applies at higher pressures? [Reply]  [No Email]
JMOR 10-31-2012 08:29:19 72.181.173.171 Report to Moderator	Re: Compressed Gas in reply to TomH in Pa, 10-30-2012 13:21:28   Quoting Removed, click Modern View to seeGeorge, I started to tell him that formula, but thought I would double check my physics book and after I read this (When the pressure of a constant mass of gas is not too great, less than 2 atmospheres, we find that a gas obeys the following relationship: ), I decided not to. That sentence precedes the formula. Do you know why? I don't. The chapter never goes on to address higher pressures & all the problems at end of chapter use pressures below 2 atmospheres. [Reply]  [No Email]
George Marsh 10-31-2012 12:44:01 50.104.246.0 Report to Moderator	Re: Compressed Gas in reply to JMOR, 10-31-2012 08:29:19   Jessie, Not sure exactly what you are asking. The question here was simple, because the temp didn't change. It's a whole different ball game when you compress a gas real fast, isothermal compression, adiabatic compression, monoatomic or diatomic gas. The equations are different for each. I put those books away 8 years ago and never want to open them again. George [Reply]  [No Email]
Terry G 10-30-2012 21:14:23 173.218.168.41 Report to Moderator	Re: Compressed Gas in reply to Terry G, 10-30-2012 13:21:28   Thank you for the answers , I finally understand it now. Been thinking on this one for awhile. Should have come here earlier. [Reply]  [No Email]
George Marsh 10-30-2012 19:17:04 50.104.246.0 Report to Moderator	Re: Compressed Gas in reply to Terry G, 10-30-2012 13:21:28   Boyle's law is used to predict the result of introducing a change, in volume and pressure only, to the initial state of a fixed quantity of gas. The before and after volumes and pressures of the fixed amount of gas, where the before and after temperatures are the same (heating or cooling will be required to meet this condition), are related by the equation: P1V1=P2V2 Here P1 and V1 represent the original pressure and volume, respectively, and P2 and V2 represent the second pressure and volume. 2400 x 1 = 14.7 x X X = 163.3 gallons [Reply]  [No Email]
buickanddeere 10-30-2012 14:56:23 184.151.61.183 Report to Moderator	Re: Compressed Gas in reply to Terry G, 10-30-2012 13:21:28   Find the btu's of energy per cubic ft then convert to gallons. Figure how many atmospheres of pressure in the tank and multiply. [Reply]  [No Email]