Like left handed and right handed people, chiral molecules behave the same way when in achiral environments. It is for this reason that enantiomers are tough to physically separate. When they are in an achiral environment, they have exactly the same physical properties. For example, they have the same boiling points, melting points and solubilities. When you think about the comparative structures of enantiomers, it makes sense that they have identical properties.
Enantiomers have the same molecular weight, connectivity and dipole moments.
This means that they can not be separated directly by any of the conventional versions of techniques you have learned in this course such as distillation, gas chromatography, extraction or recrystallization. You have probably learned in lecture that chiral molecules have optical rotations and that enantiomers rotate plane polarized light in equal and opposite directions. Plane polarized light is light that has been passed through a polarizer. Light is thought to consist of an infinite number of oscillating electrical and magnetic planes. When light passes through a polarizer, all planes but one are removed.