If the activation energy of a reaction is 80.9 kJ mol -1, the fraction of molecules at 700 K having enough energy to react to form products is e -x. The value of x is (Rounded off to the nearest integer) [. Use .R=8.31 J K -1 mol -1]

Question

If the activation energy of a reaction is 80.9 kJ mol -1, the fraction of molecules at 700 K having enough energy to react to form products is e -x. The value of x is (Rounded off to the nearest integer) [. Use .R=8.31 J K -1 mol -1] (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Fraction of molecules to have enough energy to react = e - E a / RT So, x=(Ea/R T) =(80.9 × 103/8.31 × 700) =13.9

Q. If the activation energy of a reaction is $80.9 k J$ $m o l^{- 1},$ the fraction of molecules at $700 K$ having enough energy to react to form products is $e^{- x}$ . The value of $x$ is___
(Rounded off to the nearest integer)
$[$ Use $R = 8.31 J K^{- 1} m o l^{- 1}]$

Fraction of molecules to have enough energy to react $= e^{- E a / RT}$

So, $x = \frac{E _{a}}{RT}$

$= \frac{80.9 \times 1 0 ^{3}}{8.31 \times 700}$

$= 13.9$

Q. If the activation energy of a reaction is 80.9kJ mol−1, the fraction of molecules at 700K having enough energy to react to form products is e−x. The value of x is___ (Rounded off to the nearest integer) [ Use R=8.31JK−1mol−1]

Fraction of molecules to have enough energy to react =e−Ea/RT So, x=RTEa​​ =8.31×70080.9×103​ =13.9

Q. If the activation energy of a reaction is $80.9 k J$ $m o l^{- 1},$ the fraction of molecules at $700 K$ having enough energy to react to form products is $e^{- x}$ . The value of $x$ is___
(Rounded off to the nearest integer)
$[$ Use $R = 8.31 J K^{- 1} m o l^{- 1}]$

Fraction of molecules to have enough energy to react $= e^{- E a / RT}$

So, $x = \frac{E _{a}}{RT}$

$= \frac{80.9 \times 1 0 ^{3}}{8.31 \times 700}$

$= 13.9$