Enthalpy-entropy relationships in the fluid kinetics of aqueous electrolyte solutions containing positively hydrated ions

By using new criteria for testing the validity of enthalpy-entropy relations it is shown that previously reported non-linear relationships between the activation parameters for the fluidity of aqueous electrolytes containing positively hydrated ions are essentially valid. It is impossible to establish valid enthalpy-entropy relations directly from ΔH3_φvs ΔS3_φ, and equally impossible to do so merely by transformation from log φ₁, and log φ₂. Validity can only be established by determining the true functional dependence in log φ₁, and log φ₂vs molality (m) and demonstrating its consistent appearance through log φ₁vs log φ₂ and ΔH3_φvs ΔS3_φ and ΔS3_φvs m.