Question

lesson 2.4 review

1. what changes occur to chemical bonds during a chemical reaction?
2. how does the change in energy of a chemical reaction predict whether or not the reaction will occur?
3. explain the role of enzymes and how they affect the chemical reaction of living things.

Explanation:

1. Bonds break and form.
2. Reactions with negative - energy change (exergonic) tend to occur spontaneously.
3. Enzymes are catalysts, lowering activation energy, speeding up reactions.

Answer:

1. Chemical bonds break and new ones form.
2. Exergonic (negative - energy change) reactions are likely to occur.
3. Enzymes catalyze reactions in living things by lowering activation energy.