Gen Chem Question

Question

Find the frequency factor at 273K for the decomposition of nitrogen dioxide, which has the reaction:

2 NO2(g) → 2 NO(g) + O2(g)

The activation energy of the reaction is 111 kJ/mol and the rate constant is 1.0⨉10-22 s-1. Round to 2 decimal places.

Answer 1

k = Ae^-Ea/RT

1. R is 8.31 J/K/mol
2. T is 273 K
3. E_a is 111x10³ J (convert from kJ to J)
4. k (rate constant) is 1.0x10^-22 s^-1

Solving for A, frequency factor:

1. 1.0x10^-22 = Ae^{-111x1000/(8.314)(273)}
2. ^A = 0.17 s^-1