89.6 Rate Theories of elementary reaction Kinetic theory of gases In ca. 50 bCe. the Roman philosopher Lucretius proposed that static macroscopic bodies were composed of a small scale of rapidly moving atoms all bouncing off each ther In 1738 D B Hydrodynamica", which laid the basis or the kinetic theory of ga .The gas consists of very small particles. The volume of molecule is negligible .The number of molecules is so large that statistical treatment is applicable . The rapidly moving particles constantly collide among themselves. All these collisions are perfectly elasti . The interactions among molecules are negligible§9.6 Rate Theories of elementary reaction Kinetic theory of gases In ca. 50 BCE, the Roman philosopher Lucretius proposed that static macroscopic bodies were composed of a small scale of rapidly moving atoms all bouncing off each other. In 1738 Daniel Bernoulli published “Hydrodynamica”, which laid the basis for the kinetic theory of gases. •The gas consists of very small particles. The volume of molecule is negligible. •The number of molecules is so large that statistical treatment is applicable. •The rapidly moving particles constantly collide among themselves. All these collisions are perfectly elastic. •The interactions among molecules are negligible