Calor e trabalho: são estes conceitos invariantes sob a permuta sistema-vizinhança? Heat and work concepts: are they invariant under a system-surroundings interchange?

Abstract

It is argued that the invariants associated to the First Law of Thermodynamics and to the concept of identical processes lead to a clear definition of heat and work. The conditions for heat and work to be invariant under a system-surroundings interchange are also investigated. Finally, examples are presented to illustrate the above conditions.

Keywords

• heat
• work
• invariance