Unformatted text preview: netic energy (KE) than the products. If the products have greater KE, then energy is required for the change in state to occur, so the physical change is endothermic. • Law of Conservation of Energy – Know 6 forms of energy: heat, light, chemical, electrical, mechanical, and nuclear joule (J): SI unit of energy; 1 kJ1000 J 1 watt = 1 J/s and 1 cal. 4.184 J calorie (cal): energy needed to raise the temperature of 1 g of water by 1˚C • Nutritional Calories (Cal) are equal to 1 kcal – 1 Cal 1 kcal 1000 cal Be able to carry out calculations involving energy in J, cal, Cal, and kilowatt‐hours (kW∙h). specific heat (in J/g˚C): the amount of heat to raise temperature of 1 gram of a substance by 1˚C. • Recognize that the greater the specific heat of a substance, the more heat energy it can absorb before its temperature rises. • Recognize that water has a relatively high specific heat compared to most solids. The oceans help regulate temperatures on Earth, keeping them within a relatively narrow range that allows most life on Earth. If the reactants ha...
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This document was uploaded on 03/22/2014 for the course CHEM 139 at Seattle Central Community College.
- Fall '