ExamVeda
Login
Home

Half life period of decomposition of a liquid 'A' by irreversible...

This question belongs to Chemical Engineering Chemical Reaction Engineering
Chemical Reaction Engineering
?

Half life period of decomposition of a liquid 'A' by irreversible first order reaction is 12 minutes. The time required for 75% conversion of 'A' is __________ minutes.

Answer & Solution
Correct Answer: Option B
Let's discuss the solution. Join the discussion
Examveda
Question posted by Examveda
Community

Join the Discussion

1 Comment
Chintan Bhalerao
Chintan Bhalerao 5 years ago
for first order reaction half life period is given by:
t1/2 = 0.693/K
so we have half time so by solving this equation calculate K which will be 0.05775 min^-1
now for first order irreversible equation the equation for calculating rate constant is
K = (1/T)*ln(CA0/CA)
CA = 0.25 and CA0 = 1
So by solving we will get t = 24 minutes
Thank you
Keep Learning

Related Questions on Chemical Reaction Engineering

A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and $${{\text{k}}_{\text{g}}}$$ respectively. The effective rate constant (keff) is given by
A. $${{\text{k}}_{\text{e}}}{\text{ff}} = {\text{k}} + {{\text{k}}_{\text{g}}}$$ B. $${{\text{k}}_{\text{e}}}{\text{ff}} = \frac{{{\text{k}} + {{\text{k}}_{\text{g}}}}}{2}$$ C. $${{\text{k}}_{\text{e}}}{\text{ff}} = {\left( {{\text{k}}{{\text{k}}_{\text{g}}}} \right)^{\frac{1}{2}}}$$ D. $$\frac{1}{{{{\text{k}}_{\text{e}}}{\text{ff}}}} = \frac{1}{{\text{k}}} + \frac{1}{{{{\text{k}}_{\text{g}}}}}$$
The half life period of a first order reaction is given by (where, K = rate constant. )
A. 1.5 K B. 2.5 K C. $$\frac{{0.693}}{{\text{K}}}$$ D. 6.93 K
Catalyst is a substance, which __________ chemical reaction.
A. Increases the speed of a B. Decreases the speed of a C. Can either increase or decrease the speed of a D. Alters the value of equilibrium constant in a reversible
A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)
A. $$ \propto {\text{CA}}$$ B. $$ \propto \frac{1}{{{\text{CA}}}}$$ C. Independent of temperature D. None of these
More Related Questions on Chemical Reaction Engineering