CHAPTER 9 ENTHALPY - UVic
"warming". As for pronunciation, ENtropy is usually stressed on its first syllable, while enTHALpy is usually stressed on the second. Again, I am not sure why. Definition: Enthalpy H is defined as H = U + PV. 9.1.1 You now know the etymology of enthalpy, you know how to spell it, you know its pronunciation, and you even know its definition.