Ch6(4-5)Oct13Fa08a

Ch6(4-5)Oct13Fa08a - CHEMISTRY 109 FALL 2008 ANNOUNCEMENTS...

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CHEMISTRY 109 FALL 2008 ANNOUNCEMENTS Exam II Thursday 5:45 pm Check seating assignments !!
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The heat of combustion of benzoic acid (HC 7 H 5 O 2 ) is –26.38 kJ/g. A 1.640 g sample of benzoic acid is combusted in a bomb calorimeter. The temperature of the calorimeter increases from 22.25º C to 27.20 ºC. What is the total heat capacity of the calorimeter?
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When 6.750 g of sugar is burned in a bomb calorimeter, the temperature rises from 24.92°C to 39.97°C. If C cal = 4.90 kJ/°C, find Δ E rxn for the combustion of sucrose in kJ/mole (this could also be referred to as ΔE molar ) . Sucrose = C 12 H 22 O 11
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Energy Changes ΔE has different meanings when comparing constant-volume calorimetry and constant-pressure calorimetry. Constant-pressure calorimetry: ________________ Constant-volume calorimetry: _________________ In a constant-volume calorimeter, the reaction is contained within the container so there is no displacement and w = 0. (bomb calorimeter) In a constant pressure calorimeter, the volume may change
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Energy Changes The great majority of chemical reactions occur at _______________ , such as reactions in living organisms, burning wood, dissolving of
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This note was uploaded on 09/22/2009 for the course CHEM 109 taught by Professor Hart during the Spring '09 term at Nebraska Christian.

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Ch6(4-5)Oct13Fa08a - CHEMISTRY 109 FALL 2008 ANNOUNCEMENTS...

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