The rate constant of third order reaction is:

Question

The rate constant of third order reaction is: (A)  textmol textL-1 textS-1  (B)  textmo textl-2 textL2T-1  (C)  textmo textl-1 textL texts-1  (D)  mol-2L-1S-1

Tardigrade Admin · Accepted Answer

For the reaction of nth order k=(1/ text time ) (1/[ text conc. ](n-1)) For 3rd order reaction n=3 ∴ units of k=(1/ text time ) × (1/( text conc. )3-1) =(1/ text time ) × (1/(m o l-1)2) =m o l-2 L2 T-1

Q. The rate constant of third order reaction is:

$mol L^{- 1} S^{- 1}$

$mo l^{- 2} L^{2} T^{- 1}$

$mo l^{- 1} L s^{- 1}$

$m o l^{- 2} L^{- 1} S^{- 1}$

For the reaction of nth order
$k = \frac{1}{time} \frac{1}{[ conc. ] ^{(n - 1)}}$
For 3rd order reaction $n = 3$
$∴$ units of $k = \frac{1}{time} \times \frac{1}{( conc. ) ^{3 - 1}}$
$= \frac{1}{time} \times \frac{1}{( m o l ^{- 1} ) ^{2}}$
$= m o l^{- 2} L^{2} T^{- 1}$

Q. The rate constant of third order reaction is:

molL−1S−1

mol−2L2T−1

mol−1Ls−1

mol−2L−1S−1

For the reaction of nth order k= time 1​[ conc. ](n−1)1​ For 3rd order reaction n=3 ∴ units of k= time 1​×( conc. )3−11​ = time 1​×(mol−1)21​ =mol−2L2T−1

$mol L^{- 1} S^{- 1}$

$mo l^{- 2} L^{2} T^{- 1}$

$mo l^{- 1} L s^{- 1}$

$m o l^{- 2} L^{- 1} S^{- 1}$

For the reaction of nth order
$k = \frac{1}{time} \frac{1}{[ conc. ] ^{(n - 1)}}$
For 3rd order reaction $n = 3$
$∴$ units of $k = \frac{1}{time} \times \frac{1}{( conc. ) ^{3 - 1}}$
$= \frac{1}{time} \times \frac{1}{( m o l ^{- 1} ) ^{2}}$
$= m o l^{- 2} L^{2} T^{- 1}$