Activation energy and enzymes:

  • Activation energy is the amount of energy needed to get the reactants to the transition state, in which bonds are broken and new bonds are formed.
  • Enzymes are proteins that catalyze chemical reactions. Enzymes use less activation energy and so speed up the reaction (Enzymes lowers the activation energy neede to start up a reaction).

How do enzymes speed up reaction?

A catalyst is a substance that speeds up the rate of a chemical reaction, but is chemically unchanged at the end of a reaction. This process is known as Catalysis.
Calalysts work by lowering the activation energy of the reaction.
  • Catalysts offer an alternate path for the reaction to occur
  • Lower the activation energy required for recants to form products
  • Catalysts are not changed by reactions(and also not change the reaction, but only speeds it up) and so can be used again