What is the sum of kinetic and potential energy particles in matter

Mechanical I believe because this are things that move and don’t move so that would mean that it would be mechanical since mechanical means movement

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