SPREADSHEET q(      {s  :.Ar 3LOC::M:\WDR\PSIPRINT.WDR%PPPPP` XSpreadsheet to calculate energy changes in chemical reactions. For help jump to line 30 Energy Conclusions H H H H H Left Hand Side Right Hand Side  Total energy in   kJ  H H  Bond  No Energy  Total  Bond  No Energy  Total  Total energy out   kJ H H H  C-C  [  C-C  [  Energy Change   kJ  C=C  d  C=C  d  H H  C-H    C-H  >  6(Positive energy change shows an endothermic reaction, H H C-Cl  Z   C-Cl  Z 5 -Negative number shows an exothermic reaction) H H C-O  P   C-O  P  C=O  %   C=O  % : 2Copyright Tom Pratt 1999. Distributed as Freeware C-N     C-N    Typed on a Psion Siena N-N     N-N     N=N    N=N    N=N    N=N    H-H    H-H    H-N    H-N    H-O    H-O    H-Cl    H-Cl    H-Br  n  H-Br  n  H-I  *  H-I  *  Cl-Cl    Cl-Cl    Br-Br    Br-Br    I-I    I-I    O=O    O=O   Total Energy (kJ) Total Energy (kJ)  qHelp@ 8Under 'Right Hand Side' place in the number of each bond* "Do the same under 'Left Hand Side'C! ;Section headed 'Energy conclusions' shows the energy changea" YAll values are in kJ/mole and are taken from the 1997 NEAB GCSE Data book, reference 5200