Question

what are the three assumptions of the kinetic theory of matter

Answer 1

There are a very large number of particles (molecules or atoms) involved. This means we can apply statistics to our solutions.The particles are involved in perfectly elastic collisions with their containers and each other. So no Ek is lost.The length of time involved in a collision is negligible compared to the time between collisions (i.e. we can ignore the moments when the potential energy component of the internal energy is not zero).The volume occupied by the particles is negligible compared to the volume of the container. i.e. there are big gaps between particles so they have little or no effect on each other.The particles are involved in random motion i.e. there is no resultant force on them - due to gravity