AP Physics 2

Advanced Placement Physics 2 focusing on fluids, thermodynamics, and modern physics.

Advanced Topics

Thermodynamic Processes and Engines

How Engines Transform Energy

Thermodynamic processes describe how systems exchange heat and work. Engines use these processes to convert thermal energy into mechanical work.

Key Processes

  • Isothermal: Temperature stays constant; heat flows in or out.
  • Adiabatic: No heat exchange; temperature changes as the system does work.
  • Isobaric: Pressure remains constant.
  • Isochoric: Volume remains constant.

Heat Engines

Engines like those in cars operate on cycles (e.g., the Carnot cycle), transforming heat into work with some energy lost as waste heat.

Real-World Connections

Understanding these processes helps us build more efficient engines, refrigerators, and even power plants, reducing energy waste and environmental impact.

Examples

  • A gasoline engine uses the Otto cycle to move a car.

  • Refrigerators use the reverse of an engine cycle to pump heat out of their compartments.

In a Nutshell

Thermodynamic cycles explain how engines work, converting heat into useful work in everything from cars to refrigerators.