CONCEPT: NATURE OF ENERGY Thermochemistry: the study of matter and energy associated with chemical reactions or physical changes. Energy: The capacity to do Work or to produce Heat Classification of Energy 1: potential. 3. kinetic 2: chemican. 4. thermal Energy Conversion Factors The Sl Unit for Energy is the Joule (J) named after the English scientist James Joule Energy Conversion Factors 1 calorie (cal) = 4.18 J 1 Calorie (Cal) -4184 J1 kilowatt-hour (kWh) = 3.6*10^6 EXAMPLE: Which of the following statements deals with potential energy with nonchemical energy associated? a) A car traveling with a velocity of 51.0 m/s with a mass of 1250 kg. b) Your chemistry book sitting on a table counter near the trashcan weighing 12 N at a height of 1.2 m. c) A chunk of coal being thrown into a furnace to generate heat. d) The warmth coming from a campfire. PRACTICE: An energy efficient refrigerator uses 780 kWh of electrical energy per year. How many kilocalories of electricity does it use in three years? 780kWh/year 3.6*10^6j-> 2.0*10^6 kilocalories CONCEPT: KINETIC & POTENTIAL ENERGY Mechanical Energy: energy an object possesses due to its motion as kinetic energy or position as