CHEM H2B Study Guide - Midterm Guide: Colligative Properties, Lattice Energy, Exothermic Process
21 Mar 2019
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What is the difference between endo- and exo- thermic ? give examples. 3 steps of dissolution: sep of solutes, sep of solvents, mix of solutes and solvents. Hess"s law (enthalpy of soln formation): h soln = h solute + h solvent + h mix. Water as the solvent : h soln = h solute +( h solvent + h mix ) = h solute + h hydration. Define saturated solution and supersaturated solution. which is stable and cool solution, let crystals form, impurities rejected so purer solid forms. 4 steps to recrystallization: dissolve impure sample at elevated temp, slowly. Henry"s law : s gas = k h p gas , k h = henry"s law constant, p gas = gas pressure pressure) Name the 3 factors k h depends on. Why is k h so high for nh 3 ? (refer to table 14. 4 in lecture notes) Colligative properties = property depending on the number of particle dissolved, not type!
