Unformatted text preview: onservation of Mass L ‐ Matter is neither created nor destroyed in a chemical reaction. ‐ Solve problems conserving mass. • aw of Conservation of Energy L ‐ Know 6 forms of energy: heat, light, chemical, electrical, mechanical, and nuclear joule (J): SI unit of energy; 1 kJ=1000 J and 1 watt = 1 J/s calorie (cal): energy needed to raise the temperature of 1 g of water by 1˚C Be able to carry out calculations involving energy in J, cal, Cal, and kilowatt‐hours (kWh). heat capacity (in J/mol⋅˚C): the amount of heat capacity necessary to raise the temperature of a given amount of substance by 1˚C Know the relative kinetic energy of solids, liquids, and gases specific heat (in J/g⋅˚C): the amount of heat to raise temperature of 1 gram of a substance by 1˚C. Endothermic versus Exothermic changes: – ndothermic: a change requiring energy e
– xothermic: a change that releases energy e
– o determine for physical changes consider if T
the reactants have more or less kinetic energy than the products. – o determine for chemical changes consider if T
the surrounding became hotter or colder after the reaction. • Recognize that the greater the heat capacity or specific heat of a substance, the more heat energy it can absorb before its temperature begins to rise. Chapter 4 • Know ideas of matter proposed by Democritus, Empedocles, and Aristotle. • Know the main points of...
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