Does an airborne, helium-filled balloon at temperature T0 and pressure p0 have exergy? Does a system consisting of an evacuated space of volume V have exergy? When an automobile brakes to rest, what...

Does an airborne, helium-filled balloon at temperature T0 and pressure p0 have exergy?

Does a system consisting of an evacuated space of volume V have exergy?

When an automobile brakes to rest, what happens to the exergy associated with its motion?

Can an energy transfer by heat and the associated exergy transfer be in opposite directions? Repeat for work.

When evaluating exergy destruction, is it necessary to use an exergy balance?

For a stream of matter, how does the definition of flow exergy parallel the definition of enthalpy?