CHE K121 Lecture Notes - Lecture 15: Calorimeter, Joule, Calorimetry
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Thermochemistry: bomb calorimetry (sealed system, because the volume in the bomb calorimeter is constant, what is measured is really the change in internal energy, " Hess"s law: if a rxn is carried out in a series of steps, " H for the overall rxn is equal to the sum of " Ch4 (g) + 2o2 (g) co2 (g) + 2h2o (g) Same reaction but trying to get liquid water [" H2o (l ) h2o (g) = 44. 0 k j. 2h20 (l ) 2h2o (g) = 88. 0 k j. H for breaking a particular bond in 1 mol of a gaseous substance " Hrxn = (be bon ds brok en) (be bon ds for med : standard enthalpy of formation (" ( h f. "2: the enthalpy change for the formation of one mole of a compound from its. Wednesday, october 17, 2018 elements, with all species in their standard states: for any element in its standard state = 0.
