The image above represents permeability.

To compute for permeability, five essential parameters are needed and these parameters are **Constant (A), Partial Pressure (P _{o}), Activation due to Permeation (Q_{p}), Gas Constant (R) **and

**Temperature (T).**

The formula for calculating permeability:

P = AP_{o}^{0.5} . e^{-Qp/RT}

Where:

P = Permeability

A = Constant

P_{o} = Partial Pressure

Q_{p} = Activation due to Permeation

R = Gas Constant

T = Temperature

Let’s solve an example;

Find the permeability when the constant is 12, the partial pressure is 22, the activation due to permeation is 10, the gas constant is 14 and the temperature is 2.

This implies that;

A = Constant = 12

P_{o} = Partial Pressure = 22

Q_{p} = Activation due to Permeation = 10

R = Gas Constant = 14

T = Temperature = 2

P = AP_{o}^{0.5} . e^{-Qp/RT}

P = 12(22)^{0.5} . e^{-(10)/(14)(2)}

P = 12(4.69) . e^{-10/28}

P = 56.28 . e^{-0.357}

P = 56.28 (0.699)

P = 39.38

Therefore, the **permeability **is **39.38.**

Continue reading How to Calculate and Solve for Permeability | Mass Transfer