Question

Calculate the RMS speed of a molecule of hydrogen chloride at STP (The molar volume of any gas at STP = 22.4 dm³

Answer 1

where p = 1.01325 × 10¹⁵Nm^-2 

1.01325 × 10¹⁵ kgm^-1s^-2 

V = 22.4dm³mol^-1 = 0.0224 m³mol^-1 

M = 0.03645 kgmol^-1 

This can be worked out using the relation 

R = 8.314 J K^-1 mol^-1 

M = 0.03645 kg mol^-1