collision frequency

Collision frequency is a measure of how often particles in a substance, like a gas or liquid, bump into each other over a specific period of time. It depends on factors such as particle speed, number of particles, and their size. Higher collision frequency means particles are interacting more frequently, which influences properties like pressure and reaction rates. For example, in a gas, faster-moving particles or a higher density lead to more collisions, affecting how quickly reactions occur or how the gas behaves. It’s a fundamental concept in understanding how particles interact in various states of matter.