Speeds of sound, densities, and refractive indicesof the binary mixtures containing ethanol +(2-methyl-1-propanol, 2-methyl-1-butanol, 1-pentanol, or 3-methyl-1-butanol) were measured at 288.15 K-323.15 K and atmospheric condition in the whole compositional range. The effect of temperature was analyzed by several chemical terms.