CALCULATION OF GAS PROPERTIES ON THE BASIS OF THE CLUSTER MODELL. I. Kurlapov UDC 520.181:533.15 Calculations of concentrations of clusters and some equilibrium and nonequilibrium states of gases by the formulas obtained in [Inzh.-Fiz. Zh., 54, No. 3, 438-442 (1988)] and on the basis of the hypothesis on the exponential size-distribution of clusters are presented. Kazakh State University, Almaty, Kazakhstan. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 4, pp. 23-29, July-August, 2003. Original article submitted February 5, 2002; revision submitted December 10, 2002.