Posted by **m** on Tuesday, March 5, 2013 at 8:56pm.

I've figured out the Ea but I'm not sure how to find the kcal/mol

The gas reaction N2O5 → 2NO2 + 1/2O2 follows the Arrhenius equation k = Ae(-Ea/RT) where R = 8.314 J K-1 mol-1 and 1 calorie = 4.184J. At the temperature T=273K, k = 3.46 x 10-5 s-1, whereas at T = 298K, k = 8.87 x 10-3 s-1. What is the value of the activation energy Ea in kJ/mol and in kcal/mol. What is the rate constant at 100 oC?

ln(3.46 x10-5 s-1)/(8.87 x 10-3 s-1)=Ea/(8.314 J/(K.mol))(1/(298 K)-1/273k)

Ea= 1.50 x 105 J or 150 kJ

## Answer This Question

## Related Questions

- Chemistry - N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to ...
- Chemistry - N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to ...
- chemistry - The temperature at which a reaction is running is increase from 11....
- chemistry - The decomposition of N2O5 proceeds according to the following ...
- Chemistry - Can you check my calculations, please? It's for a lab we did in ...
- CHEMISTRY!! NEED IMMEDIATE HELP PLEASE!!! - a. Calculate the delta H, delta G, ...
- chemistry - 1.) At what temperature will the rate constant for the reaction H2...
- chemistry - Use Hess's law and the following equations to calculate ÄH for the ...
- Science - N2O5 gives 2NO2 plus 0.5 O2. Rate for first order reaction. K = 5 * 10...
- Chemistry - N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to ...

More Related Questions