Problem: Increasing the reaction temperature from 25°C to 30°C raises the reaction rate 7.5- fold. What is the activation energy?A. 5.5 kJ B. 303 kJ C. 43.1 kJ D. 16.2 kJ E. 110. kJ

FREE Expert Solution

We’re being asked to determine the activation energy of the reaction when the rate increases by 7.5x from 25°C to 30°C


This means we need to use the two-point form of the Arrhenius Equation:


lnk2k1 = -EaR1T2-1T1


where:

k1 = rate constant at T1 

k2 = rate constant at T

Ea = activation energy (in J/mol) 

R = gas constant (8.314 J/mol•K) 

T1 and T2 = temperature (in K).

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Problem Details

Increasing the reaction temperature from 25°C to 30°C raises the reaction rate 7.5- fold. What is the activation energy?

A. 5.5 kJ 

B. 303 kJ 

C. 43.1 kJ 

D. 16.2 kJ 

E. 110. kJ

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