To be effective your need a cooling jacket for the tubing. It would take making a hole in the lid of the pot and fastening a small copper flang in the whole and then the tubing to the flange. I guess you could drape a wet towel over the tubing and keep pouring water on to the towel to facilitate cooling. It is feasable but takes more then just some copper tubing. and an ordinary pot lid you need to make some modifications.
cheers