Activation Energy

The decomposition of NO2 follows a second order rate equation. Data at different temperatures are as follows: T (K) 592 603 627 651.5 656 k (cm3/gmol.sec) 522 755 1700 4020 5030 Compute the energy of activation Energy from the data. The reaction is 2NO2  2NO + O2

Half Life method

Problem: The thermal decomposition of nitrous oxide (N2O) in the gas phase at 1030oK is studied in a constant volume vessel at various initial pressures of N2O. The half-life data so obtained are as follows: po (mm Hg) 52.5 139 290 360 t1/2 (sec) 860 470 255 212 2N2O  2N2 + O2 Determine the rate equation that fits the data

Kinetics of N2O

Establish the kinetics of the thermal decomposition of Nitrous oxide from the following data and find the reaction rate at 990oC and an initial pressure of 200 mm Hg. t, min 20 53 100 % decomposition 23 50 73

Mixed Reactors in series

Acetic acid is hydrolyzed in three stirred tank reactors operated in series. The feed flows to the first reactor (V = 1 lit) at a rate of 400 cm3/min. The second and third reactors have volumes of 2 and 1.5 liters respectively. The first order irreversible rate constant is 0.158 min-1. Calculate the fraction hydrolyzed in the effluent from the third reactor.

Kinetics from CSTR Data

Problem. The kinetics of an aqueous phase decomposition of A is investigated in two CSTR's in series, the first having half the volume of the second. At steady state with a feed concentration of 4 gmol/lit., and mean residence time of 65 sec in the second reactor, the concentration of feed to second from the first is found to be 2 gmol/lit., while that of the stream leaving the second is 1 gmol/lit. Find the suitable kinetic rate expression.