Chem 2080 Review for Exam 1 - Chemistry 2080 Review for...

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Chemistry 2080 Review for Exam 1 1. Enthalpy of Reactions and Heats of Formation The reaction of ammonia and hydrogen peroxide form hydrazine and water and the enthalpy of this reaction is measured to be -241.45 kJ/mol of hydrazine. 2NH 3 (g) + H 2 O 2 (l) N 2 H 4 (l) + 2H 2 O (l) It is known that ammonia can oxidize to form nitris oxide and water and the enthalpy of this reaction is -906.18 kJ/mol of reaction. 4NH 3 (g) + 5O 2 (g) 4NO (g) + 6H 2 O (g) Determine the enthalpy of formation of hydrazine, given this information and the following: H f H 2 O (g) = -241.83 kJ/mol H f H 2 O (l) = -285.83 kJ/mol H 2 (g) + 2O 2 (g) H 2 O 2 (l), H = -187.78 kJ/ mol N 2 (g) + O 2 (g) 2NO (g), H = 180.6 kJ/ mol 2. Bomb Calorimeter An alternative approach to bomb calorimetry is to establish the heat capacity of the calorimeter, exclusive of the water it contains. The heat absorbed by the water and by the rest of the calorimeter must be calculated separately and then added together. A bomb
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This note was uploaded on 04/29/2011 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell University (Engineering School).

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Chem 2080 Review for Exam 1 - Chemistry 2080 Review for...

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