# Momentum and the pressure of an ideal gas. Easy Question.

by jmcgraw
Tags: ideal, momentum, pressure
 HW Helper P: 2,277 You know what is an elastic collision right?, if a particle with speed v crashes against a perfectly elastic wall, it will go the opposite direction with the same speed v, so the particle will have a change in momentum. $$\Delta p = -mv_{x} - mv_{x}$$