Internal
Energy ?
•Internal energy, U
(total) or u (per unit mass) is the sum of all
microscopic
forms of energy.
•It can be viewed as the
sum of the kinetic and potential energies of the molecules
• Due to the
vibrational, translational and rotational energies of the moelcules.
•Proprtional to the
temperature of the gas.
Q – total heat
transfer (J)
– rate of
total heat transfer (J/s, W)
q –
heat transfer per unit mass (J/kg)
– Heat Flux,
heat transfer per unit area (J/m2)
Q, q …
?!%