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A liquid decomposes by irreversible first order kinetics and the half...

This question belongs to Chemical Engineering Chemical Reaction Engineering
Chemical Reaction Engineering
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A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be __________ minutes.

Answer & Solution
Correct Answer: Option D
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2 Comments
Chintan Bhalerao
Chintan Bhalerao 5 years ago
For 1st order reaction half time is given by: T1/2 = 0.693/k
here, it is given that T1/2 = 8 minutes so by using the equation calculate K.
It is given that it is a first order reaction,
So K = (1/T)*ln(CA0/CA) is the equation
Assume CA0 as 1 and CA from the given question will be 0.25 (As 75% is converted)
Why 0.25 because CA gives us the amount of reactant left after conversion.
Put all the given values and calculate T you will get 16 minutes
I hope you all got it.
If anyone wants to study chemical engineering i give classes please mail me on
chintanbhalerao3@gmail.com
Habtamu Fekadu
Habtamu Fekadu 6 years ago
how? please show me clearly
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