Chap 6 Obj Chang10 F09

Chap 6 Obj Chang10 F09 - these manipulations on H. 7....

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CHEM 111 Chapter 6 Objectives (Chang 10) Dr. Gnezda Be able to do the following: 1. Define and explain the terms energy, thermal energy, heat, system, surroundings, Law of Conservation of Energy, thermochemistry, enthalpy. 2. Know that the enthalpy change ( H) for a chemical reaction represents the heat given off or absorbed during the reaction. 3. Know that an exothermic reaction has a negative H (heat given off from the system to the surroundings) and an endothermic reaction has a positive H (heat absorbed by the system from the surroundings). 4. Interpret a thermochemical equation in terms of mole relationships and enthalpy changes. 5. Given a balanced chemical equation, its H, and the mass or moles of reactants, calculate the heat evolved or absorbed in the reaction (as in Example 6.3). 6. Manipulate thermochemical equations reversing the equation or multiplying by factors. Know the effects of
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Unformatted text preview: these manipulations on H. 7. Define specific heat and give its units. 8. Given three of the variables q, m, s, t, calculate the fourth variable using the equation q=ms t. (as in Example 6.5). 9. Perform constant pressure calorimetric calculations (like those done in class) in which a hot (or cold) piece of metal is added to a sample of cold (or hot) water. Examine the picture of a constant pressure calorimeter (Figure 6.9). 10. Use The Indirect Method (p. 255-258) and Hesss Law to calculate H rxn for problems like Example 6.9. Assigned problems to work (These problems will not be collected): 6.1, 6.2, 6.3, 6.7, 6.9, 6.22, 6.23, 6.24, 6.26, 6.34, 6.36, 6.62, 6.64, 6.72, 6.80, 6.82...
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