Derivation of thermodynamic quantities from kinetic measurements

Derivation of thermodynamic quantities from kinetic measurements

Results are presented of both traditional equilibrium and also gas phase kinetic measurements. These results are used to show, — (1) that measured enthalpies of formation of the fluorosilanes are probably in error, (2) a 13—silicon substituted alkyl radical is stabilised by ca 12 kJ mol' and (3) the simplest divalent silicon species, SiR2, has an enthalpy of formation of 273 ± 6 kJ mo11, some 3...

Kinetic Derivation of Gauss's Law and Its Thermodynamic Significance*

The entropy S is a dimensionless quant i ty since the tempera ture T has dimensions of energy so that it can be measured in energy units. The r a n d o m variable n is the number of particles, and n s denotes its average or mos t probable value. E is the internal energy, p the chemical potential and V the volume. According to (1), the entropy is the thermodynamic potential tha t determines the ...

Measurements of Electrical Quantities

Direct Calculation of Thermodynamic Quantities for

The XXX Heisenberg model is studied at finite temperature. The free energy is derived without recourse to Thermal Bethe Ansatz method and Quantum Transfer Matrix method. The result perfectly agrees with the free energy derived by Thermal Bethe Ansatz method. An explicit expression of the cluster expansion coefficient in arbitrary order is presented for the first time.

Far-from-equilibrium measurements of thermodynamic length.

Thermodynamic length is a path function that generalizes the notion of length to the surface of thermodynamic states. Here, we show how to measure thermodynamic length in far-from-equilibrium experiments using the work fluctuation relations. For these microscopic systems, it proves necessary to define the thermodynamic length in terms of the Fisher information. Consequently, the thermodynamic l...