The average kinetic energy of uf6(g) is 4.98 kj/mol at some temperature. what is the average kinetic energy of sf6(g) at that sa
2 answers:
Answer:
The average kinetic energy of SF₆(g) is 4.98 kj/mol.
Explanation:
Given that,
Kinetic energy of UF₆(g)=4.98\ kj/mol
We need to calculate the average kinetic energy of SF₆(g)
Using formula of average kinetic energy
Where, k = Boltzmann constant
=Avogadro number
R =gas constant
Here, average kinetic energy depends only on temperature not on special molar mass
So, The SF₆(g) average kinetic energy is same as UF₆(g
Hence, The average kinetic energy of SF₆(g) is 4.98 kj/mol.
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Answer:
<em>His angular velocity will increase.</em>
Explanation:
According to the conservation of rotational momentum, the initial angular momentum of a system must be equal to the final angular momentum of the system.
The angular momentum of a system = 'ω'
where
' is the initial rotational inertia
ω' is the initial angular velocity
the rotational inertia =
where m is the mass of the system
and r' is the initial radius of rotation
Note that the professor does not change his position about the axis of rotation, so we are working relative to the dumbbells.
we can see that with the mass of the dumbbells remaining constant, if we reduce the radius of rotation of the dumbbells to r, the rotational inertia will reduce to .
From
'ω' =
ω
since is now reduced, ω will be greater than ω'
therefore, the angular velocity increases.