CHEM H2B Study Guide - Midterm Guide: Freezing-Point Depression, Supersaturation, Dynamic Equilibrium
Document Summary
H atoms most difficult to locate need crystalline sample. Lecture 7 forms of carbon - graphite & diamond - allotropes : same element, diff structure property of only elements. Molarity = solute in mol / solution in l. Molality = solute in mol / solvent in kg temperature independent. H soln = h solute + h solvent + h mix hess"s law: change in enthalpy of stepwise process is sum of enthalpy changes of steps. | h solute + h solvent | < | h mix | h soln is negative exothermic dissolution bc both lower in pe & increase entropy (koh, libr) | h solute + h solvent | >| h mix | h soln is positive endothermic if dissolution occurs (nh 4 no 3 , agno 3 ) | h solute + h solvent | = | h mix | h soln is 0 dissolution is thermoneutral (nacl, naf)
