Rate of reactions

[Awuah29]

The rate of most reactions tends to double with a 10-Celsius increase in temperature. This is thought to be due to

a. decrease in the activation energy
b. an increase in the activation energy
c. an increase in the equilibrium constant
d. an increase in the fraction of molecules possessing at least
the activation energy
e. a decrease in the fraction of molecules possessing
at least activation energy.

Does Kaplan cover this faction of molecules rate of reactions
the answer here is D, why not A?

---

Members don't see this ad.

 

[ElectraOnAzalea]

the only thing that changes the energy of activation are catalysts. heat just speeds up the molecules movements. so they can reach the require energy of activation.

 

[llopop]

Agreed with the previous post. A lot of people confuse the thermodynamics of the reaction with the kinetics of the reaction. Temperature changes the rate at which we can move along an energy hill but has nothing to do with the height of the hill (a thermodynamic function).