CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

First Order Reaction

A 1st order...

Question

A $1^{s t}$ order reaction is $50 %$ complete in $30$ minutes at $27^{o} C$ and in $10$ minutes at $47^{o} C$ . Calculate energy of activation for the reaction.
(Assume log $3$ = $0.48$ )

A

46.87 K J m o l^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

42.21 K J m o l^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

44.11 K J m o l^{- 1}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

49.20 K J m o l^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $44.11 K J m o l^{- 1}$
$k_{1} = \frac{0.693}{10}$

$k_{2} = \frac{0.693}{30}$

$l o g \frac{k_{2}}{k_{1}}$ = $\frac{E_{a}}{2.303 \times R} (\frac{1}{T_{1}} - \frac{1}{T_{2}})$

$l o g 3 = \frac{E_{a}}{2.303 \times 8.314} (\frac{1}{300} - \frac{1}{320})$

$E_{a} = 44.11 K J {m o l}^{- 1}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. A first order reaction is

50

30

27^{o} C

10

47^{o} C

. Calculate the reaction rate constant at

27^{o} C

and the energy of activation of the reaction in

k J

{m o l}^{- 1}

Q. A first order reaction is

50

30

27^{o} C

10

47^{o} C

. The energy of activation of the reaction is:

Q. A 1st order reaction is 50% complete in 30 minute at

27^{o} C

and in 10 minute at

47^{o} C

. The sum of rate constants for reaction at

27^{o} C

47^{o} C

Q. A first order reaction is

50 %

30

27^{\circ} C

and in 10 minutes at

47^{\circ} C

. The energy of activation

E_{a}

of the reaction is:

(l o g 2 = 0.3, l o g 3 = 0.5, R = \frac{25}{3} J K^{- 1} m o l^{- 1})

Q. A first order reaction is 50% completed in 30 minutes at

27^{\circ} C

and in 10 minutes at

47^{\circ} C

. Calculate the energy of activation of the reaction in

{kJ mol}^{- 1} .

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Integrated Rate Equations

CHEMISTRY

Watch in App

explore_more_icon

Explore more

First Order Reaction

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon