Question

The most probable velocity ( in cm/s ) of hydrogen molecule at 27° C will be

Answer 1

The speed possessed by the maximum number of molecules in a given sample of the gas is called as Most probable speed . It is denoted by Ump
Ump=Urmsx0.8166
WHERE, Urms=√3RT/M
=1.58 x 10 ⁴√T/M
=1.58 x 10 ⁴√√300/2
=1.58 x 10 ⁴ x12.24
=19.33 x 10⁴ cm/s

Ump=Urms x 0.8166
=19.33 x 10⁴ x0.8166
=15.78 x 10⁴ cm/s