Question

Key Questions and Terms Notes
What is thermal energy? Give an example.
How does adding thermal energy influence a chemical change?
Which phase changes are exothermic?
Which phase changes are endothermic?
What happens in an exothermic reaction?
What happens in an endothermic reaction?
What are the benefits of using repeated trials and replication in a scientific investigation?
How are trials used in an experiment?
How does replication work?

Answer 1

Answer:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.”

During an exothermic reaction bonds break and new bonds form and protons and electrons go from a structure of higher potential energy to lower potential energy. During this change, potential energy is converted to kinetic energy, which is the heat released in reactions. In an endothermic reaction the opposite occurs.