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Chapter 6:
Energy Flow in the Life of a Cell
What is Energy?
Answer: The Capacity to do Work
Types of Energy:
1) Kinetic Energy = Energy of movement
• Light (movement of photons)
• Heat (movement of particles)
• Electricity (movement of charged particles)
2) Potential Energy = Stored energy
• Chemical (stored in bonds)
• Electrical (stored in battery)
• Positional (stored in location of object)
Potential energy can be converted to kinetic energy
(& vice versa)
Potential Energy Kinetic Energy
Chapter 6: Energy Flow in Cells
Kinetic Energy
•Energy of motion
Includes:
• electrical
• thermal (heat)
• others
Potential Energy
• Energy that matter possesses because of its
location or structure.
Pressing the spring down stores potential energy
Laws of Thermodynamics: Explain the properties and behavior
of energy
1st Law of Thermodynamics:
• Amount of energy in universe remains constant
• Energy is neither created or destroyed
• Law of Conservation of Energy
• Energy can be converted (Chemical →Heat)
2nd Law of Thermodynamics:
• When energy converted, the amount of useful
energy decreases
• No process is 100% efficient
