3 results about "Collision frequency" patented technology

Collision frequency is defined in chemical kinetics and collision theory, in the background of theoretical kinetics. For a reaction between A and B, the collision frequency (Z) is the number of collisions between A and B occurring in the container per unit volume per unit time. Z=nAnBσAB√(8kBT/πμAB), SI unit of Z is number of collision m⁻³s⁻¹=1000NA mol L⁻¹ s⁻¹, where NA is Avogadro constant. where: nA is the number density of A in the gas (unit m⁻³), nB is the number density of B in the gas (unit m⁻³), σAB is the reaction cross section (unit m²), the area when two molecules collide with each other, simplified to σAB=π(rA+rB)², where rA the radius of A and rB the radius of B. kB is the Boltzmann's constant unit m² kg s⁻² K), T is the temperature (unit K), μAB is the reduced mass of the reactants A and B, μAB=mAmB/(mA+mB) (unit kg)