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A student writes: the internal energy of n moles of any… | StemPy Lab
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A student writes: the internal energy of n moles of any ideal gas is 32 nRT. What is wrong?
Physics
Hard
High School (11–12)
Heat & Thermodynamics › Kinetic Theory of Gases
NEET
Created by
StemPy Lab
A student writes: the internal energy of
n
n
n
moles of any ideal gas is
3
2
n
R
T
\tfrac32 nRT
2
3
n
R
T
. What is wrong?
It is true only for a monatomic gas. In general
U
=
f
2
n
R
T
U = \tfrac{f}{2}nRT
U
=
2
f
n
R
T
Nothing. It holds for every ideal gas
It should be
3
2
n
k
B
T
\tfrac32 nk_BT
2
3
n
k
B
T
It should be
5
2
n
R
T
\tfrac52 nRT
2
5
n
R
T
for every gas
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