(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A cylinder 1.00 m tall with an inside diameter of 0.120 m is used to hold propane gas (molar mass: 44.1 g.mol-1) for use in a barbeque. It is initially filled with a gas until the gauge pressure is 1.30 x 10^7 Pa and the temperature is 22.0⁰C. The temperature of the gas remains constant as it is partially emptied out of the tank, until the gauge pressure is 2.50 x 10^5 Pa. Calculate the mass of propane that has been used.

2. Relevant equations

1.. pV = nRT

2.. p1V1 / T1 = p2V2 / T2

3. The attempt at a solution

I am really wrong here but just need a guiding hand...

The volume of the cylinder is 0.11309733m^3

From Eq 1 I get the number of moles = 60 then total mass = 60 x 44.1 = 2643.64g

Then did this again for pressure 2 (2.5 x 10^5 Pa) to get = 50.84g

Difference being 2592.8g of gas used but this seems large.

I then looked at Eq 2 and I got V2 = 0.588m^3

Not really sure where to go with that....

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Calculate the mass of propane that has been used

**Physics Forums | Science Articles, Homework Help, Discussion**