Chem 162 Correctly Answered Questions| UpToDate | Already Graded A+

What is a solute? : the substance that is dissolved What is a solvent? : the substance in which the solute dissolves Usually, is there more solvent or solute present in a solution? : solvent When determining the enthalpy of solution, is deltaH1 and deltaH2 endothermic or exothermic? : endothermic Why are deltaH1 and deltaH2 endothermic processes? : the attractive forces between particles must be overcome to expand solute and solvent What type of process is deltaH3 in finding deltaHsoln? : exothermic Why is deltaH3 an exothermic process? 2 | P a g e : attractive forces between solute and solvent particles cause them to come together and stabilize What determines if the enthalpy of solution is exothermic or endothermic? : relative magnitudes during the process What is the equation for the enthalpy of solution? : deltaH(sol) = deltaH(1) + deltaH(2) + deltaH(3) What is the relationship between endothermic deltaH(sol) and IMFs when finding a positive deltaH(sol)? : an endothermic process means there needs to be very different IMF strengths because the energy needed in deltaH(3) to stabilize the solution will not be as great as the energy put in to break the solute and solvent What is the equation for enthalpy of solution for an ionic solute in water? : deltaH(sol) = deltaH(L) + deltaH(hyd) What types of solutes do polar solvents dissolve best? : Polar and ionic