The rate of an elementary gas-phase reaction increases when the temperature is raised…
CHEMISTRY · Single correct · A Level · Chemistry · Kinetics · Kinetics
Problem
The rate of an elementary gas-phase reaction increases when the temperature is raised from 298K to 308K. Which of the following best explains this observation in terms of collision theory?
(a) The total number of molecular collisions per unit time increases significantly at 308K.
(b) The activation energy of the reaction decreases spontaneously as the temperature rises.
(c) A larger fraction of collisions possesses energy equal to or greater than the activation energy at 308K.
(d) The average kinetic energy of the reactant molecules becomes equal to the activation energy at 308K, so nearly every collision results in reaction.