Hans Peter Jørgen Julius Thomsen, Popular Science Monthly (1883)
“ From the principle of the conservation of energy, it follows, in like manner, that no energy is lost or created, and that, consequently, the whole of the energy originally present in the bodies, which act upon each other, appears again in the products of the chemical reaction, although often in a different manner than before. ”
Hans Peter Jørgen Julius Thomsen, Popular Science Monthly (1883)
“ THEORETICAL chemistry is based upon the molecular theory, according to which all matter is made up of molecules, and these molecules of atoms. The physical state of bodies depends upon the arrangement and motions of the molecules; the other physical and chemical properties depend upon the kind and number of the atoms in the molecule, upon their arrangement and relative motions. Every action which causes a change in the internal structure of the molecules is a chemical action. ”
Hans Peter Jørgen Julius Thomsen, Popular Science Monthly (1883)
“ The energy of a molecule is always the same at the same temperature; any increase or diminution of the energy of the molecules, without change of their internal structure, manifests itself as an elevation or a lowering of the temperature of the substance in question. ”
