﻿PC- 
  

   'S 
  

   •8 
  

   •7 
  

   •6 
  

   •5 
  

   •4h- 
  

  

  Homogeneous 
  Gas 
  Reactions 
  at 
  Constant 
  Pressure. 
  441 
  

  

  These 
  numbers 
  give 
  the 
  curves 
  in 
  fig. 
  2. 
  The 
  curves 
  are 
  

   applicable 
  to 
  all 
  ter-molecular 
  gas-reactions 
  of 
  the 
  type 
  

  

  Fig. 
  2. 
  

   •5 
  10 
  :i-5 
  20 
  2-5 
  3-0 
  3-5. 
  40 
  4*5 
  5-0 
  5-5 
  

  

  6:0 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  ..- 
  

  

  

  

  

  

  

  ^ 
  

  

  =••■ 
  

  

  - 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  p, 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  I 
  

  

  

  

  r 
  

  

  ^ 
  

  

  r 
  

  

  3 
  

  

  

  

  r 
  

  

  c 
  

  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  ./ 
  

  

  

  

  

  

  

  

  

  

  

  

  y*i* 
  

  

  

  

  

  

  

  

  

  

  7 
  

  

  f 
  

  

  7 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  P 
  

  

  .-/ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  \ 
  1 
  

  

  

  

  

  / 
  

  

  

  / 
  

  

  / 
  

  

  

  

  

  >■ 
  

  

  

  

  

  

  

  

  1 
  y 
  

  

  / 
  

  

  

  /• 
  

  

  < 
  

  

  / 
  

  

  

  VELOCITY 
  OF 
  THE 
  RE 
  A 
  C 
  TION 
  

  

  2A+B 
  -> 
  C 
  

   B 
  in 
  excess, 
  ex.- 
  - 
  % 
  

   X- 
  fraction 
  of 
  A 
  converted 
  In 
  time 
  t 
  

  

  _/ 
  

  

  h 
  

  

  / 
  

  

  / 
  

  

  ' 
  

  

  / 
  

  

  

  

  

  - 
  

  

  

  ' 
  

  

  

  

  

  

  h 
  

  

  i 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  

  

  

  

  

  

  , 
  

  

  / 
  

  

  

  

  

  

  

  

  j 
  

  

  / 
  

  

  r 
  

  

  

  

  

  

  

  

  

  P'- 
  

  

  initial 
  concentration 
  of 
  B 
  — 
  b 
  

  

  

  

  

  

  1 
  

  

  A' 
  

  

  

  ' 
  initial 
  concentration 
  of 
  A 
  

  

  a 
  

  

  k 
  

  

  v 
  

  

  

  

  

  

  

  h 
  = 
  velocity 
  constant 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  — 
  

  

  Mm- 
  

  

  1 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  1-5 
  20 
  

  

  30 
  

  

  3-5 
  

  

  •40 
  4-5 
  

  

  50 
  

  

  55 
  

  

  2A 
  + 
  B> 
  at 
  constant 
  pressure 
  when 
  the 
  volume-change 
  is 
  

   such 
  that 
  a= 
  — 
  -| 
  and 
  gas 
  B 
  is 
  in 
  excess. 
  Such 
  a 
  reaction 
  

   is 
  2NO 
  + 
  2 
  -> 
  N 
  2 
  4 
  oxygen 
  in 
  excess. 
  

  

  Reactions 
  with 
  A 
  in 
  excess. 
  

  

  Let 
  us 
  reconsider 
  these 
  reactions 
  in 
  which 
  a— 
  — 
  3 
  ^and 
  

   a= 
  — 
  § 
  when 
  the 
  A 
  gas 
  is 
  in 
  excess. 
  

   Take 
  first 
  «=-J. 
  

   Equation 
  (4) 
  becomes 
  

  

  1 
  ^ 
  

  

  W 
  Jo 
  (/>-x) 
  2 
  (i-x) 
  

  

  1 
  ( 
  2p 
  1 
  ^ 
  

  

  -X 
  

  

  /> 
  + 
  l 
  

  

  2p 
  1 
  (p-l) 
  2 
  ^>(l-X) 
  Mp-1) 
  /? 
  

  

  -Up-XJ 
  

  

  6-0. 
  

  

  