Topic 8 Flashcards
(8 cards)
1
Q
What is diffusion?
A
Spontaneous process where molecules move from High Concentration to Low concentraion, Equalising
2
Q
Give the Equation for Fick’s First Law
A
3
Q
What is the Diffusion contant?
A
Symbol: D
Proportional to the Square root of T
Dependent on:
Temp, Viscosity, molecular mass and shape
4
Q
Equation to calculate the Diffusion Constant
A
D = kT/f
f = Friction constant
5
Q
What does Fick’s Second Law show?
A
The change of diffusion per unit time
6
Q
Give the Equation of Fick’s Second Law
A
δ = Change caused by one variable per unit time
7
Q
Equation showing Fick’s Second law solving a case where medicine is injected into the vein.
A
M = Amount of medicine solution
8
Q
Describe the gas exchange in alveloli
A
Diffusion in 0.3s
Makes exchange possible despite high velocity.
