Size-dependent thermodynamic properties and equilibrium constant of chemical reaction in nanosystem: An experimental study (II)

• Thermodynamic property of nano-ZnO reacted with acetic acid is related to its size.
• Gibbs free energy, enthalpy, entropy and equilibrium constant depend on size of ZnO.
• There is a linear relationship between them.

The effects of size on thermodynamic properties and the equilibrium constant were studied using nanosize zinc oxide and acetic acid solution as a research system. The experimental results indicate that the molar Gibbs free energy, the molar enthalpy and the molar entropy of the reaction decrease, but the equilibrium constant increases with decreasing reactant size. Linear trends were observed between the reciprocal of size for nano-reactant and thermodynamic variable, which are in good agreement with the previous reported results.