Hess's law ____.
Choose one answer.
a. determines the way a calorimeter works
b. makes it possible to calculate ΔH for complicated chemical reactions
c. states that when you reverse a chemical equation, you must change the sign of ΔH
d. describes the vaporization of solids
I keep leaning toward B, but then i think it could be A too. B just seems too simple of an answer. What do you think?