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Unformatted text preview: (E = q + w, E is if q > w. ) system q = -w = + 24. The decomposition of limestone, CaCO 3 (s) into lime CaO(s) and CO 2 (g) at constant pressure requires the addition of 178.1kJ of heat/mole of CaCO 3 . a. Write a balanced thermochemical equation. (178.1 kJ + CaCO 3 CO 2 + CaO) (CaCO 3 CO 2 + CaO H = 178.1kJ) b. Draw an enthalpy diagram for the reaction. 28. Consider the following reaction. 2Mg(s) + O 2 (g) 2MgO(s) H = -1204kJ/mol a. exothermic or endothermic? (exothermic) b. Calculate the amount of heat transferred when 2.4g of Mg reacts at constant pressure. (-59 kJ) c. How many grams of MgO are produced during an enthalpy change of 96.0kJ? (6.43g MgO) d. How many kJ of heat are absorbed when 7.50g of MgO are decomposed in Mg and O 2 at constant pressure? (112 kJ) Reaction Progress E n e r g y...
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This note was uploaded on 10/28/2009 for the course CHEMISTRY 9498 taught by Professor Jason during the Spring '09 term at Alderson-Broaddus College.
- Spring '09