Energía de activación

Chemical reactions require an initial input of energy, known as activation energy, to begin. This is true even for exothermic reactions. Successful reactions occur when particles collide with at least this amount of energy.

What is necessary to start any chemical reaction?

• A catalyst

• A reactant

• Energy

• A solvent

Even the most exothermic reactions require what to begin?

• A decrease in temperature

• An increase in pressure

• Some initial energy

• A change in volume

What must particles have to successfully react upon collision?

• A high velocity

• Sufficient activation energy

• A specific shape

• A large mass

Which of the following is true about activation energy?

• It is not required for endothermic reactions.

• It is only needed for reactions in a gaseous state.

• It is the minimum energy needed for a reaction to occur.

• It is the energy released during a reaction.

Why do particles need activation energy to react?

• To change their state

• To overcome repulsive forces

• To increase their mass

• To decrease their volume