chrispsu
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Ideal Gas Law Problem :)
A balloon is filled with helium at a pressure of 1.0 x 10^5 Pa. The balloon is at a temperature of 23°C and has a radius of 0.13 m.
(a) How many helium atoms are contained in the balloon?
(b) Suppose we increase the number of helium atoms in the balloon by a factor of 5, keeping the pressure and the temperature fixed. By what factor does the radius of the balloon increase?
PV=nRT
i know i need the 4/3pir^3 for the volume as well
for part a)
First off converted Temp to Kelvin.
i used PV=nRT to solve for n.
That answer i multiplied by 6.022x10^23. I thought that would be the correct answer but it is not.
for part b)
I did nx5. PV=nRT again but solved for the volume. Divided by 4/3pi and took the third root of that to find the radius. But again my answer did not come out correct.
Any advice to where I might be going wrong would be awesome! Thanks!
Homework Statement
A balloon is filled with helium at a pressure of 1.0 x 10^5 Pa. The balloon is at a temperature of 23°C and has a radius of 0.13 m.
(a) How many helium atoms are contained in the balloon?
(b) Suppose we increase the number of helium atoms in the balloon by a factor of 5, keeping the pressure and the temperature fixed. By what factor does the radius of the balloon increase?
Homework Equations
PV=nRT
i know i need the 4/3pir^3 for the volume as well
The Attempt at a Solution
for part a)
First off converted Temp to Kelvin.
i used PV=nRT to solve for n.
That answer i multiplied by 6.022x10^23. I thought that would be the correct answer but it is not.
for part b)
I did nx5. PV=nRT again but solved for the volume. Divided by 4/3pi and took the third root of that to find the radius. But again my answer did not come out correct.
Any advice to where I might be going wrong would be awesome! Thanks!