Question

Which one of the following distillation methods is known as equilibriumdistillation A. Flashdistillation B. Fractionaldistillation C. Moleculardistillation D. Simpledistillation

Answer 1

Flash distillation is also known as equilibrium distillation. (Option A)

• A single-stage separation process is flash distillation (sometimes known as "equilibrium distillation").
• A liquid mixture feed is forced through a heater to raise the temperature and enthalpy of the mixture. It then travels through a valve, partially evaporating the liquid.
• The process is referred to as "flash" distillation because the feed vaporizes immediately after entering the drum. The system in the flash chamber is reaching equilibrium due to the close contact between liquid and vapor.
• Because it separates two liquids while the liquid and vapor phases are in balance, flash distillation is also known as equilibrium distillation.
• Consequently, option A is the correct answer.