《大学物理》英文课件19 The Kinetic Theory of Gases教程文件.pptVIP

The Kinetic Theory of Gases ;A New Way to look at Gases;Avogadro’s Number;Ideal Gases;Work Done by an Ideal Gas at Constant Temperature - isothermal expansion ;RMS (root-mean-square) Speed at T = 300K ;Sample Problem;Translational Kinetic Energy;Mean Free Path (平均自由程）;The Distribution of Molecular Speeds ;The Distribution of Molecular Speeds ;The Distribution of Molecular Speeds - Maxwell’s speed distribution law;The Distribution of Molecular Speeds ;Sample Problem;The Molar Specific Heats of an Ideal Gas – Internal Energy ;The Molar Specific Heats of an Ideal Gas - Molar Specific Heat at Constant Volume ;Only valid for monatomic gases (Helium);The Molar Specific Heats of an Ideal Gas - Molar Specific Heat at Constant Pressure ;The Molar Specific Heats of an Ideal Gas - Molar Specific Heat at Constant Pressure ;Sample Problem;Sample Problem;Degree of freedom f : independent ways in which the molecule can move and store energy. Monatomic : f = 3 Diatomic : f = 5 Polyatomic: f = 6;Equipartition of energy: Each degree of freedom has associated with it – on average – an energy of ; A Hint of Quantum Theory ;The Adiabatic Expansion of An Ideal Gas;Free Expansion;Sample Problem;Homework