        MyCTMainForum  A <-> B equilibrium energy

Chemical thermodynamics index               Two interconverting species A and B have an equilibrium ratio that depends on their difference in energy and the temperature, according to the equation ΔG=RT*ln(k), where k is the equilibrium constant. This can be derived from the Arrhenius (temp-rate dependence) equations for the forward and backwards reactions.              Ratio a:b :1 ppm :2 :5 :10 % (:100) :1 against At temperature °C °F K Rankine Temperature x °C °F K Rankine Energy difference kJ/mol kcal/mol Hartrees eV wavenumber J nm photon a:b ratio at temp. x Proportion of b at temp. x % [fraction] Equilibrium constant   Enter a measured A:B ratio and the temperature it was measured at. The calc then gives the energy difference between the A and B states. This is either negative or positive, depending whether A or B is the lowest in energy.
If you also enter a "temperature x" in the third input box, the calc gives the expected equilibrium A:B ratio (and the proportion of B as a percentage) for that temperature.          