Explain why a packed fractionating column is more efficient than an unpacked one. ( Experiment : Simple and fractional distillation of a cyclohexane -toluent Mixture, column is packed with copper...

Explain why a packed fractionating column is more efficient than an unpacked one. ( Experiment : Simple and fractional distillation of a cyclohexane -toluent Mixture, column is packed with copper sponge in fractional distillation)