Question

The de broglie wavelength of helium atom at room temperature is

Answer 1

Find the typical de-Broglie wavelength associated with a He atom in helium gas at room temperature (27° C) and 1 atm pressure and compare it with the mean separation between two atoms under these conditions.

Answer 2

V

rms

=

M

3RT

=

4×10

−3

3×8.314×298

=1363 ms

−1

λ=

mv

h

=

4×10

−3

×1363

6.626×10

−34

×6.023×10

23

=7.32×10

−11

m