Available energy quantity

[iliekturtles]

Add available energy (J/kg) quantity and associated units.

https://www.nist.gov/pml/nist-guide-si-appendix-b9-factors-units-listed-kind-quantity-or-field-science#HEAT

[Aehmlo]

How're you defining "heat" here? The first heat section you link to has both volumetric and mass heat density units shown, and not many of them, but there are other heat sections. In my mind, the quantity that makes the most sense in association with heat is rate of energy transfer (power), but then why bother using heat in particular?

[iliekturtles]

Edited original issue to be for available energy (J/kg).