CONTENTS XI 

 CHAPTER V 



MOLECULAR AND ATOMIC ENERGY ' 



SECTION PAGK 



52. DULONG AND PETIT's LAW FOR GASES .... 115 



53. RATIO OF THE MOLECULAR TO THE TOTAL ENERGY . . . 116 



54. MONATOMIC MOLECULES ........ 119 



55. POLYATOMIC MOLECULES 121 



56. APPROXIMATE CALCULATION OF THE ATOMIC ENERGY IN 



POLYATOMIC MOLECULES 127 



57. DISSOCIATION AND DISGREGATION . . . . . . 130 



58. DEPENDENCE OF THE SPECIFIC HEATS ON TEMPERATURE . 132 



59. DEPENDENCE OF THE SPECIFIC HEAT ON THE NUMBER OF 



ATOMS 137 



60. DEGREES OF FREEDOM OF THE MOTION . 139 



PAET II 



THE MOLECULAR FREE PATHS AND THE 

 PHENOMENA CONDITIONED BY THEM 



CHAPTER VI 



MOLECULAR FREE PATHS 



61. OBJECTIONS TO THE KINETIC THEORY ..... 149 



62. REFUTATION OF THE OBJECTIONS 151 



63. PROBABILITY OF MOLECULAR COLLISIONS 153 



64. PROBABILITY OF A LONGER PATH BEING TRAVERSED . . . 156 



65. CALCULATION OF THE MEAN FREE PATH UNDER SIMPLIFIED 



ASSUMPTIONS 157 



66. PROBABILITY OF PARTICULAR FREE PATHS 159 



67. FREE PATH IF ALL THE MOLECULES HAVE EQUAL SPEED . 160 



68. MOLECULAR FREE PATH WITH AN UNEQUAL DISTRIBUTION OF 



SPEEDS 161 



69. MOLECULAR PATH-VOLUME 162 



70. FREQUENCY OF COLLISIONS . . . . . . . . 163 



71. RELATIONS OF THE FREE PATH TO THE PRESSURE AND 



TEMPERATURE ......... 164 



72. ON THE ABSOLUTE VALUE OF THE FREE PATH . . . . 169 



