2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223424Combined with the principle of entropy maximum and CS state equation, the critical size for a cluster to nucleate then the critical volume fraction of a phase transition is determined in this paper, and our result is in good agreement with the experiments. Furthermore, no parameter is introduced in the discussion.7 pages, 1 figureSoft Condensed Mattertext