Home › JEE Main › Chemistry › Chemical Kinetics › Arrhenius equation: k = A × e^(-Ea/RT). What is A?
Arrhenius equation: k = A × e^(-Ea/RT). What is A?
AActivation energy
BPre-exponential or 'frequency' factor
CEquilibrium constant
DTemperature
Answer & Solution
Correct answer: B. Pre-exponential or 'frequency' factor
A is the frequency factor (or Arrhenius prefactor): accounts for collision frequency and orientation. Has same units as k. Often only weakly T-dependent compared to exp term.
Related questions
Chemical kinetics studies the rate of a reaction and also its:Manganese dioxide is given as a catalyst for the decomposition of:A catalyst increases the rate of a reaction without itself being:Lowering the activation energy of a reaction makes the rate:Raising the temperature of a reaction makes the rate:The exponential factor gives the fraction of molecules with kinetic energy:Arrhenius was a chemist from:The physical justification of that equation was provided by: