Extra Credit: Answer the following questions and show all of your work.
1. Calcium chloride is dissolved in water and forms calcium and chloride ion as well as -82.7kJ of heat. How much heat is produced from 5.00 grams of calcium chloride in water.
2. Sodium chloride absorbs 3.7 kJ when dissolved. How much heat is produced from 5.00 grams of sodium chloride.
Equations:
3. Are the following endothermic or exothermic?
- Two unknown substances are mixed together and the beaker becomes warm.
- The combustion of methane
- Breaking bonds
- Condensation
Answers:
1. -3.72 kj
2. .317 kj
3. exo, endo, endo, exo
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