- #1
kingstar
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Homework Statement
Argon is a monatomic gas for which all the internal energy of the molecules may be considered to
be translational kinetic energy.
Molar mass of argon = 4.0 x 10-2
kg.
The Boltzmann constant = 1.38 x 10-23 J kg-1
.
The Avogadro constant = 6.02 x 1023 mol-1
.
Calculate the internal energy of 8.0 g of argon gas at a temperature of 100 K.
Homework Equations
pV=nRT or pV=NKT
U=3/2NKT
The Attempt at a Solution
So far I'm assuming you need U=3/2NKT
We know that 1 mol = 4x10^-2 Kg
So i did 0.008/4x10^2 = 0.2
0.2 x Avagardo's Constant = 1.204x10^23
And subbed that into U=3/2NKT as N
The final answer I got was as U was 248.4J
To be honest i have no clue what I did as its been so long since I've done Physics.
Thanks for any help or any pointers in the right direction.