FL: Forms of Energy (Exchange)

Forms of Energy

$\Delta E_{tot} = \Delta E_{k} + \Delta E_{p} +\Delta U$

Definition:

The internal energy, $U$, of a system is related to the molecular energy contained within the materials of the system.

Note:

For ideal gases $u$ is a function of temperature only. Why?

Definition:

Work is typically thought of as "useful" energy. It is a way that energy is exchanged between system/surroundings. It is a path function. (Mechanical equilibrium)

Definition:

Heat is is a way that energy is exchanged between system/surroundings via thermal energy. It is a path function. (Thermal equilibrium)