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Mass Transfer

Q1:

Langmuir equation is associated with

A leaching

B adsorption

C steam distillation

D multicomponent absorption.

ANS:B - adsorption

The Langmuir equation is associated with adsorption. The Langmuir equation is a mathematical model that describes the process of adsorption onto a solid surface from a gas or liquid phase. It was developed by Irving Langmuir in 1916 and is commonly used to characterize the adsorption behavior of gases and solutes onto solid surfaces. The Langmuir equation is typically expressed as: 𝑞𝑞max=𝑘⋅𝐶1+𝑘⋅𝐶qmax​q​=1+k⋅Ck⋅C​ Where:

  • 𝑞q = amount of adsorbate adsorbed per unit mass of adsorbent (adsorption capacity)
  • 𝑞maxqmax​ = maximum adsorption capacity of the adsorbent
  • 𝑘k = Langmuir constant (related to the affinity of the adsorbate for the adsorbent)
  • 𝐶C = equilibrium concentration of the adsorbate in the gas or liquid phase
The Langmuir equation is widely used in the fields of surface chemistry, catalysis, environmental science, and chemical engineering to model and predict adsorption phenomena on solid surfaces.



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