Typical Prompt: Given the following thermochemical equations at 25°C:
Calculate the standard enthalpy of formation (ΔH°f) of C2H5OH(l).
Searching for the 1972 AP Chemistry free response answers isn’t just about cheating on a half-century-old test. It serves three modern purposes:
(a) Finding the Atomic Weight
(b) Volume of Hydrogen at STP