Given, initial and final temperatures be T1 and T2 i.e. 27°C and 127°C . ∴T1=27+273=300K and T2=127+273=400K Let, initial and final rms velocities be v1 and v2. Since, rms speed, vrms=√
3RT
M
where, R is universal gas constant and M is molar mass. ∴vrms∝√T ⇒