[[Polymer Solutions]] An ==ideal== solution is defined as: - Solvent and solute molecules are identical in size - Intermolecular interactions are equivalent ## [[Thermodynamic properties of mixtures|Thermodynamic properties]] $ΔS_m = -R(n_1 lnX_1 + n_2 lnX_2) \qquad ΔG_m = RT(n_1 lnX_1 + n_2 lnX_2)$