The melting point of gallium is 85.59°F (29.77°C).
Answer:
is a solution whose pH is above 7or is a basic solution
The equation to use:
Change in energy = mass x SHC x change in temperature
Energy = 0.02 x 0.450 x 26
= 0.234 J
Explanation:
It is known that for a body centered cubic unit cell there are 2 atoms per unit cell.
This means that volume occupied by 2 atoms is equal to volume of the unit cell.
So, according to the volume density
2 atoms =
=
Formula for volume of a cube is . Therefore,
Volume of the cube =
As lattice constant (a) =
=
Therefore, the value of lattice constant is .
And, for bcc unit cell the value of radius is as follows.
r =
Hence, effective radius of the atom is calculated as follows.
r =
=
=
Hence, the value of effective radius of the atom is .
For the answer to the question above,
322Joules of heat energy is added to the system (gold bar) while no work is done on the gold bar, this is an isochoric/isovolumetric process, thus
<span>ΔU = 322J + 0 </span>
<span>=322J </span>
<span>Therefore the internal energy increase by <u>322J
</u>I hope my answer helped you.<u>
</u></span>