17.1 Heat Flow
17.1 Heat Flow
Lesson Objectives
- Describe how chemical potential energy relates to heat and work.
- Describe the law of conservation of energy and how heat flows between system and surroundings during both
endothermic and exothermic processes. - Use the specific heat equation to perform calculations that relate mass, specific heat, change in temperature,
and the amount of heat absorbed or released.
Lesson Vocabulary
- calorie
- chemical potential energy
- endothermic
- exothermic
- heat
- heat capacity
- law of conservation of energy
- specific heat
- surroundings
- system
- thermochemistry
Check Your Understanding
Recalling Prior Knowledge
- What is energy?
- What is temperature, and what is its relationship to energy?
Chemical reactions are accompanied by transfers of energy. Keeping track of heat flow and energy requirements is
important for a full understanding of chemical processes. In this lesson, you are introduced to heat, energy, and the
specific heat of substances.
Heat and Work
Energy is the capacity for doing work or supplying heat. When you fill your car with gasoline, you are providing it
with potential energy.Chemical potential energyis the energy stored in the chemical bonds of a substance. The