Lecture 4: Materials Chemistry III

Types of Chemical Reactions

• Chemical reactions can be broadly classified into different categories.

  • Exothermic Reactions: Liberate energy, associated with breaking and making bonds.

    • Example: Reaction results in a temperature increase; heat is exiting the system.

  • Endothermic Reactions: Absorb energy from surroundings, resulting in a decrease in temperature.

  • Example: Reaction feels cold to touch as it absorbs heat; heat is entering the system.