Thermostoichiometry

IconUsing your knowledge of thermostoichiometry, solve each problem below. Remember, it helps to know the start and end of each reaction. Then, use dimensional analysis to solve the problem. Make sure you show all of your work for each problem.

This activity is available below or in a printable version.

  1. Typing on a computerBCl3 + 3 H2O → H3BO3 + 3 HCl; ∆H = –112 kJ
    1. How much energy is released if four moles of water react?
    2. How much energy is released if 14.5 g of HCl is produced?
  2. 2HgO → 2 Hg + O2; ∆H = +181 kJ
    1. How many grams of HgO are used when 475 kJ is reacted?
    2. How many grams of O2 are absorbed when 179 kJ is produced?
  3. S2Cl2 + CCl4 → CS2 + 3 Cl2; ∆H = +112 kJ
    1. How many grams of chlorine are absorbed when 145 kJ is produced?
    2. If 14.5 g of S2Cl2is used, how much energy is produced?
  4. CaCO3 + 2 NH3 → Ca(CN)2 + 3 H2O; ∆H = –90.0 kJ
    1. How many grams of NH3 are used when 798 kJ is released?
    2. How much energy is released if 19.7 g of water is produced?

Assignment
Once you have completed this assignment, please submit your work to the dropbox.