Mohsen Nafafi - Nuclear Science and Technology Research Institute, AEOI, Tehran, Iran
Mohsen Golmohammadi - Department of Chemistry , Payam Noor University , Iran

In this paper, we calculate some thermodynamic properties for thorium using someEquations of State (EOS) based on Dieterici model. The EOSs consist of Dieterici(D), Dieterici-Carnahan-Starling (DCS) and Dieterici-Guggenheim (DG). Thecalculated thermodynamic properties are saturated liquid and vapor density, vaporpressure, fugacity, thermal expansion and internal pressure. It seems all EOSs predictwell the behavior of thermodynamic properties of thorium.