What happens to ice as it melts?
a. the average kinetic energy of the water molecules decreases.
b. the released energy increases the intermolecular forces.
c. the absorbed energy breaks apart intermolecular forces.
d. the average kinetic energy of the water molecules increases.

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next