Abstract

The totality of processes that occur when gases are compressed in a closed volume were studied. An equation describing the removal of molecules from the gas phase undergoing compression was suggested. The solution to this equation predicted the existence of two modes in the development of this process and the possibility of the transition from one mode to another at a point. The influence of the size of gas molecules on the form of the suggested equation and, accordingly, on the removal of molecules from the gas phase was analyzed. The case of the equisignificance of the effective volume of molecules in the gas and liquid phases and the situation which allowed us to ignore this parameter for particles in the gas phase were studied. The predicted differences in condensation for these models were substantial and could likely be checked experimentally. The results obtained were used to suggest an equation of state of real gases, which physically correctly described the regions of their compression and condensation and the compression of condensed liquids. The influence of liquid compressibility on the form of the equation of state and the corresponding isotherms was studied.

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