Glossary

Before getting into the world of thermodynamics, we need to understand some basic notions and definitions.

■ System

• The thermodynamic system is any portion of space or materials defined for study. A system can be open or closed.
  1. Open system: can exchange materials with surrounding
  2. Closed system: does not exchange materials with surrounding
  ※ Isolated system: does not exchange materials and energy with surrounding

■ Parameters

• The parameters are either extensive or intensive depending on whether they depend on the mass of the system.
  1. Intensive parameters: the value does not depend on the volume(size) of system.
     ex) density, temperature, pressure etc.
  2. Extensive parameters: depend on the size of system.
     ex) volume, mass, energy, entropy etc.

■ Others

1. Adiabatic: No heat transfer bewettn system and surrounding
2. Diathermal: Heat can pass through