Kuis Transfer Massa Antarfase

Which of the following is the correct definition of mass transfer between phases?

• Mass transfer within a single phase

• Mass transfer between two phases

• Mass transfer due to a chemical reaction

• Energy transfer between two phases

In a gas-liquid system, which of the following generally controls the overall mass transfer rate?

• Gas phase resistance

• Liquid phase resistance

• Both gas and liquid resistances equally

• Bulk phase concentration

What is the main driving force for mass transfer between phases?

• Temperature difference

• Concentration gradient

• Pressure difference

• Surface tension

The two-film theory of mass transfer assumes that:

• Mass transfer occurs only through convection

• There is a stagnant film in each phase where mass transfer occurs through diffusion

• Only one phase offers resistance to mass transfer

• Surface renewal occurs instantaneously

Which of the following defines the overall mass transfer coefficient based on the gas phase (KG)?

• 1KG=1kG+mkL​

• ​1KG=1kL+mkG

• ​1KG=mkG+1kL

• ​KG=kG+kL

Which of the following is NOT an example of mass transfer between phases?

• Gas absorption in liquid

• Evaporation of liquid into the air

• Heat conduction in a metal rod

• Distillation of a liquid mixture

Mass transfer coefficient has the same unit as:

• Speed

• Diffusivity

• Concentration

• Pressure

In mass transfer between phases, the equilibrium line represents:

• The maximum driving force available

• The relationship between concentrations in two phases at equilibrium

• Mass flux across the interface

• The line where no mass transfer occurs

Which parameter represents the ratio of mass transfer resistance in the gas phase to that in the liquid phase?

• Partition coefficient

• Mass transfer coefficient

• Henry's law constant (H)

• Slope of the equilibrium curve (m)

In the theory of surface renewal mass transfer, what causes mass transfer to occur?

• Only diffusion through stagnant film

• Continuous convection currents

• Renewal of surface elements due to turbulence

• Uniform flow across the interface