Section 1
Energy and Energy Changes
Define these terms: system, surroundings, thermal energy, chemical energy.
What is heat? How does heat differ from thermal energy? Under what condition is heat transferred from one system to another?
These are various forms of energy: chemical, heat, light, mechanical, and electrical. Suggest several ways of converting one form of energy to another.
Define these terms: thermochemistry, exothermic process, endothermic process.
Stoichiometry is based on the law of conservation of mass. On what law is thermochemistry based?
Describe two exothermic processes and two endothermic processes.
Decomposition reactions are usually endothermic, whereas combination reactions are usually exothermic. Give a qualitative explanation for this observation.