CHEM 1050 Lecture Notes - Lecture 3: Heat Capacity, Bond-Dissociation Energy, Joule

• School: University of Guelph
• Department: Chemistry
• Course: CHEM 1050
• Professor: Lori Jones

Document Summary

50. 0 ml dilute agno3 is added to a solution with oh ions in a coffee cup calorimeter. Ag2o precipitates and the temperature of the liquid goes from 23. 78 to 25. 19 c. Assume that the mixture has the same specific heat as water. Solution: qsurroundings = mass specific heat change in temp qsurroundings = 150. g 4. 184 j/g c (25. 19 - 23. 78 c) qsurroundings = 885 joules. Rxn exothermic (t of mixture rose; rxn released heat to its surroundings). A 48. 9 sample of metal at 95. 72 c is added to 43. 58 g water at 23. 84 c. The final temperature of the (metal + water) is 28. 37 c. Heat associated with metal cooling = heat associated with water warming. (massmetal specific heatmetal t = massh2o specific heath2o t. (48. 9 g cs (28. 37 - 95. 72) = 43. 58 g 4. 184 j/g c (28. 37 - 23. 84) When ice at 0 c melts to liquid h2o, it absorbs 334 j per gram.