Lecture_Notes_100909a

Lecture_Notes_100909a - degree Celsius Heat Calculated from...

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Endothermic vs Exothermic
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Is water freezing an exo- or endo- thermic process? e x o thermic ndothermic 46% 54% 1. exothermic 2. endothermic
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Is sweat evaporating an exo- or endo- thermic process? e x o thermic ndothermic 72% 28% 1. exothermic 2. endothermic
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Enthalpy of Reaction H N 2 + O 2 2NO 180.75kJ Rx
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Enthalpy of Reaction H N 2 + O 2 2NO -99.20kJkJ Rx
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Thermochemical Equations y Ammonia reacts with oxygen to form NO and water vapor, the enthalpy for the reaction is -906 kJ. Calculate the heat (in kJ) associated with the complete reaction of 155 g of ammonia.
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Specific Heat and Molar Heat Capacity y Specific Heat- (s) heat required to raise the temperature of one gram of a substance by one degree Celsius y Molar Heat Capacity- (C or c) heat required to raise the temperature of one mole of a substance by one
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Unformatted text preview: degree Celsius Heat Calculated from Heat Capacity Calorimetry y At constant P (open container) Calorimetry Calorimetry y 50.0 mL of 1.0 M NaOH and 50.0 mL of 1.0 M HCl were mixed at 25.0 o C in a calorimeter. The final temperature after the reaction was 31.9 o C. What is the energy released in the reaction? The specific heat of water is 4.18 J/ o C g. Calorimetry y Zinc metal reacts with hydrochloric acid to form zinc chloride and hydrogen gas. When 0.103 g of Zn is combined with enough HCl to make 50.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 22.5 o C to 23.7 o C. Find H for this reaction....
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This note was uploaded on 10/14/2009 for the course CHEM 105ALg at USC.

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Lecture_Notes_100909a - degree Celsius Heat Calculated from...

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