Exciting Facts About Evaporators

How does an evaporator work?

An evaporator is operated at 15 in. Hg vacuum. What would be the temperature of the product inside the evaporator?

Answer:

The temperature of the product inside an evaporator operated at 15 in. Hg vacuum would depend on the specific substance's vapor pressure-temperature relationship.

Evaporators are fascinating devices that are used to remove liquid from a solution through evaporation, leaving behind the desired product. They work by lowering the pressure inside the evaporator chamber, causing the liquid to boil at a lower temperature than its normal boiling point.

When an evaporator is operated at 15 in. Hg vacuum, the temperature of the product inside will be determined by the vapor pressure-temperature relationship of the specific substance being evaporated. This information can be found using a phase diagram or table for the substance.

For example, water at a pressure of 0.507 atm (equivalent to 15 in. Hg vacuum) would boil at a temperature lower than its boiling point at standard atmospheric pressure. To provide an accurate temperature for the product in the evaporator, the substance's saturation vapor pressure data at various temperatures would be needed.