1. Calculate the rms velocity of CO2 molecules at 400 oC.

2. From the equipartition of energy, derive the formula for calculation the rms velocity of a gas.

3. Calculate the number of collisions per molecule per second as pd2*v*N/V where v is the velocity, V is the volume and d is the molecular diameter. Calculate this for a gas of MW= 78 and a diameter of 0.25 nm with a gas of MW=36 and a diameter of 0.20 nm both at 25oC and 1 bar. The appropriate velocity for this calculation is sqr(8kT/pm).