Question

a molecule of mass m of an ideal gas collides with the wall of a vessel with a velocity v and returns back with the same velocity. the change in linear momentum of a molecule is.

Answer 1

Change in the linear momentum is zero because in ideal gas collisions , the energy of a molecule remains same.. so its initial velocity is equal to final velocity and mass is also same.

Momentum = mass x velocity

when neither mass nor velocity changes,, so Kinetic energy and momentum remains unchanged