The measure of the energy of motion of particles in matter

The measure of the energy of motion of particles within matter is temperature. From kinetic molecular theory, we know that the kinetic energy of any one gas molecule is determined by its temperature. Therefore this measure of energy will rise proportionately alongside temperature.

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf