Which of the following are reasons why increasing concentration of reactants increases the rate of reaction? A. Increase in reactant particle speed
B. Increase in frequency of reactant particle collisions
C. increase in kinetic energy of reactant particles
D. increased energy of individual collisions.
E. All of the above

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa