Is electrical conductivity an extensive property or an intensive property?

Google it that might work

The answer to this problem is. 67

They can measure  the amount of energy gained or lost

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