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Physics
Physics
Problem
Which expression gives the change in internal energy
Δ
U
\Delta U
Δ
U
of an ideal monatomic gas when its temperature changes from
T
1
T_1
T
1
to
T
2
T_2
T
2
? a)
Δ
U
=
5
2
n
R
(
T
2
−
T
1
)
\displaystyle \Delta U=\tfrac{5}{2}\,nR\,(T_2-T_1)
Δ
U
=
2
5
n
R
(
T
2
−
T
1
)
b)
Δ
U
=
3
2
n
R
(
T
2
−
T
1
)
\displaystyle \Delta U=\tfrac{3}{2}\,nR\,(T_2-T_1)
Δ
U
=
2
3
n
R
(
T
2
−
T
1
)
c)
Δ
U
=
n
R
(
T
2
−
T
1
)
\displaystyle \Delta U=nR\,(T_2-T_1)
Δ
U
=
n
R
(
T
2
−
T
1
)
d)
Δ
U
=
5
3
n
R
(
T
2
−
T
1
)
\displaystyle \Delta U=\tfrac{5}{3}\,nR\,(T_2-T_1)
Δ
U
=
3
5
n
R
(
T
2
−
T
1
)
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