What must be the temperature of water during cooling in distillation?

During cooling in distillation, the temperature of the water should typically be lower than the boiling point of the liquid being condensed, which is usually around 20-30°C, depending on the specific distillation setup and the boiling point of the vapor. This ensures efficient condensation of the vapor back into liquid form. The cooling water must maintain a temperature that adequately removes heat without allowing the vapor to escape. Adjustments can be made based on the specific distillation process and the desired efficiency.