Die Beziehungen zwischen molekularen Informationsgrö\en und den dazugehörigen molaren thermodynamischen Grö\en

Summary

Information Theory is applied to chemical reactions involving selection processes. It turns out that the information entropy S _I is closely related to the corresponding entropy function S _T as used in chemical thermodynamics. The change of the molecular information entropy for 1 mol of uniformly synthesized substance is given in „moldit” where Δ S _I=Δ S_T/R. With n decision in the course of synthesis of a single molecule and z possibilities for each decision there is Δ S _I =n lg z. (E.g. The number of possibilities z is 2 if one special optical isomer has to be selected out of the two existing kinds with any decision.) The entropy change is calculated for various selective processes as, for instance, the replication of polymers with a certain lenght in the case of uniform subunits or with a certain composition on sequence; in the case of different subunits. The replication processes require additional selection work that can be derived from the calculated entropy changes.