Homework Answers
We will plot a graph between ln(intensity) and time
intensity at first half life =?
ln [I] = -0.069 X 10.04 + 8.034 = 7.34
[I] = 1540.7
Second half life is when the intensity is half of this
[I] = 1540.7 / 2 = 770.35
So second half life will be calcualted from
y = -0.069x + 8.034
ln [770.35] = -0.069 x + 8.034
1.384 / 0.069 = 20.05 seconds
The third half life is when the intensity is half of second half life = 770.5/2 = 385.25
y = -0.069x + 8.034
ln[385.25] = -0.069x + 8.304
x = third half life = 34.05 seconds
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