14_LectureWeb - Announcements Reminder: You have a CAPA...

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Announcements Reminder : You have a CAPA assignment (Set 6) due before you head out for Spring Break (Saturday, March 1, 8 AM). Learning Objectives 2/26/08 You should: 1. know the First Law of Thermodynamics and its consequences. 2. understand the sign conventions for heat and work and be able to apply them to deter - mine internal energy changes in a system using the First Law. 3. be able to determine the relationship between internal energy, work, and heat under conditions of constant volume, constant pressure, constant temperature (isothermal), and no heat exchange (adiabatic). 4. understand the difference between expansion (P-V) work at constant pressure and reversible expansion work and be able to calculate these two types of P-V work. 5. be familiar with the distinctions between specific heat, heat capacity, and molar heat capacity. 6. understand why the heat capacity at constant volume ( C V ) differs from the heat capac - ity at constant pressure ( C P ) for gases. 7. know the relationship between C V and C P for ideal monatomic gases. 2 Thermodynamics considers the interconversion of heat and other forms of energy, such as work. Application of thermodynamics in the context of chemical reactions provides answers to questions such as Ë How much energy is consumed or released by a reaction? Is the reaction endother - mic or exothermic? Ë At equilibrium, does a reaction favor reactants or products? In other words, what is the size of the equilibrium constant K ? 3 First Law of Thermodynamics A general statement of the First Law of Thermodynamics is In any process, spontaneous or nonspontaneous, the total internal energy ( E ) of a system and its surroundings is constant. In other words, energy is conserved.
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14_LectureWeb - Announcements Reminder: You have a CAPA...

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