Yarman, TolgaKholmetskii, Alexander L.Korfali, OnderEnerji Sistemleri Mühendisliği / Energy Systems EngineeringEnerji Sistemleri Mühendisliği / Energy Systems Engineering2024-10-152024-10-1520101992-19502-s2.0-78549280125https://hdl.handle.net/20.500.14517/6474Yarman, Tolga/0000-0003-3209-2264In this paper, a connection between the long lasting macroscopic classical laws of gases and the quantum mechanical description of non-interacting particles confined in a box was found, thus constituting an ideal gas. In such a gas, the motion of each individual molecule can be considered to be independent of all other molecules, and the macroscopic parameters of an ideal gas, mainly, pressure P and temperature T, can be defined as simple average quantities based on individual motions of all molecules in consideration. It is shown that for an ideal gas enclosed in a macroscopic box of volume V, the constant gamma appearing in the classical law of adiabatic expansion law, that is, (PV gamma = constant), can be derived based on quantum mechanics. Physical implications of the result we disclose are discussed.eninfo:eu-repo/semantics/closedAccessAdiabatic transformationquantum mechanicskinetic theory of gasesArticle51015241529WOS:0002845525000054