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

Suppose we make a circular hole 2 millimeter in diameter in a balloon. Calculate the initial rate at which oxygen escapes through the hole (at 0° C), in number of oxygen atoms leaving the balloon per second.

2. Relevant equations

1/4 n*A*v

3. The attempt at a solution

1/4 n*A*v

n = N/V at # of molecules/m^3 (density)

n = 6.022e23/.0224 = 2.68839286E25

This is at STP so 22.4 L volume at one mol of gas

A = area

Pi*.0002^2*1/4 = 3.14159265 × 10-8

V = velocity

= sqrt(3*k*T/m)

=

k = boltzman constant 1.4e-23

T = 273K at STP

m = 2.65780731e-26 kg for one molecule of hydrogen

Atoms/second = 656.816755

What am I doing wrong?

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

Dismiss Notice

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: Effusion of Gas from a Balloon

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