A reference material for calibrating and verifying the calorimeter of propellant explosion heat is composed of nitrocellulose(NC),nitroglycerine(NG),centralite and vaseline.
Most historians would consider the 1860s to be the birth of modern nutrition — this was around when German researchers pioneered the use of room-sized devices called calorimeters.
Now there's a simple formula that allows us to calculate the heat change of a reaction, simply by measuring the change in temperature that occurs in a calorimeter.