To get an idea of the time required for diffusion, estimate how long it might take...
To get an idea of the time required for diffusion, estimate how long it might take for ammonia (NH3) to be detected 10 cm from a bottle after it is opened, assuming only diffusion is occurring.
Homework Answers
time required for diffusion is calculated by
t = x^2/2D
x = mean distance traveled by the diffusing solute
D = diffusion coefficient
for Ammonia D = 1.51*10^-5 cm^2/sec
using given data
t = (10 cm)^2/(2*1.51*10^-5 cm^2/sec)
t = 3.311*10^6 sec = 38.32 days
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