Lesson: Energy Changes in Reactions Chemistry • First Year of Secondary School

Students will be able to

• define different types of energy, with an emphasis on chemical, thermal, and light energy,
• understand the concept of a system and the surroundings and how the transfer of heat between them occurs during a chemical reaction,
• identify and describe the different types of systems: open, closed, and isolated,
• understand that in chemical reactions, energy is both required and released, but the overall change in energy is important,
• understand that the plimsoll notation refers to standard conditions and define what these conditions are,
• Identify that the overall change in energy during a reaction is known as the enthalpy change and has the symbol .