Une Chem 1011 Exam Questions (138 Terms) With Verified Definitions Updated 2024

Instantaneous dipole {Ans: temporary dipole that occurs for a brief moment in time when the electrons of an atom or molecule are distributed asymmetrically (through dispersion forces)}Dissolution {Ans: Dissolution is the process where a solute in gaseous, liquid, or solid phase dissolves in a solvent to form a solution Energy exchanged during dissolution: solute-expanded solute: endothermic (energy is consumed to overcome solute-solute attractions) solvent->expanded solvent: endothermic (energy is consumed to overcome solvent-solvent attractions) solute->solvent: exothermic (energy is given off when solute-solvent attractions form)}Unsaturated solution {Ans: A solution that contains less solute than a saturated solution does and that is able to dissolve additional solute}vaporization {Ans: Liquid to gas (endothermic)}∆Hvap {Ans: energy needed to vaporize a mole of a liquid 44.01 kJ/mol to vaporize a mole of liquid}condensation {Ans: Gas to liquid (exothermic)}bimolecularity (most common) {Ans: when 2 molecules are involved in a reaction to produce products. A + A --> products Rate = k[A]^2 (second order) A + B --> products Rate = k[A][B] (each is first order, second order overall)}Supersaturated solution {Ans: a solution that holds more dissolved solute than is required to reach equilibrium at a given temperature. not every