Question

At what temperature, pressure remaining unchanged, will the r.m.s velocity of hydrogen be double of its velocity at N.T.P ?

Answer 1

keeping pressure constt. the rms velocity is directly proportional to sq. root of temp. so doubling the rms velocity will require 4 times the initial temp.

so if we consider at ntp T= 300k

then we require T = 1200k to double rms velocity