Apparent molar volumes (ϕV) and viscosity B-coefficients for some carbohydrates (d-glucose, d-mannitol, and d-sucrose) in (0.001, 0.003, and 0.005) mol·kg−1 aqueous cetrimonium bromide (N-cetyl-N,N,N-trimethyl ammonium bromide) (C19H42BrN) solutions have been determined from solution density, ρ, and viscosity, η, measurements at (298.15, 308.15, and 318.15) K as a function of the concentration of carbohydrates. The limiting apparent molar volume (ϕV0) and experimental slopes (Sv*) obtained from the Masson equation have been interpreted in terms of solute−solvent and solute−solute interactions, respectively. The viscosity data were analyzed using the Jones−Dole equation, and the derived parameters A and B have also been interpreted in terms of solute−solute and solute−solvent interactions, respectively, in the mixed solutions. The structure-making or -breaking ability of carbohydrates has been discussed in terms of the sign of (δ2φV0/δT2)P as well as dB/dT. The three-dimensional representation of the inves...