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CHMA10H3 (108)
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Chapter 6

Chapter 6 - Thermochemistry

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University of Toronto Scarborough
Ann Verner

Chapter 6 Thermochemistry 6.1 Chemical Hand Warmers Thermochemistry: The study of the relationships between chemistry and energy 6.2 The Nature of Energy: Key Definitions - Energy (E): The capacity to supply heat or do work - Kinetic Energy (E k: The energy of motion or energy that is being transferred, E =km*v 2 units are Joules (J) - Potential Energy (E p: Stored energy of energy associated with the composition and position of the object Units: 1 cal =4.184 J - System: Material or process within one is studying the energy changes within - Surroundings: Everything else with which the system can exchange energy with - Heat: Energy transferred between a system and its surrounding as a result of temperature difference, heat flows from HOTTER to COLDER (temperature may change and phase may change) 6.3 The First Law of Thermodynamics: There is No Free Lunch - First Law of Conservation of Energy: Energy CANNOT be created or destroyed, when energy is transferred or converted between objects, the total amount of energy present at the beginning must be present at the end - Energy Flow and Conservation of Energy: - Internal Energy E: Sum of kinetic and potential energies of all particles that compose the system, changes depend on the amount of energy at the beginning and end - State Function: Mathematical function whose result only depends on initial and final conditions 6.4 Quantifying Heat and Work www.notesolution.com
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