Apparent molar volumes and apparent molar heat capacities of aqueous tetrahydrofuran, dimethyl sulfoxide, 1,4-dioxane, and 1,2-dimethoxyethane at temperatures from 278.15 K to 393.15 K and at the pressure 0.35 MPa

We determined apparent molar volumes Vϕ at 278.15 ⩽ (T/K) ⩽ 368.15 and apparent molar heat capacities Cp,ϕ at 278.15 ⩽ (T/K) ⩽ 393.15 at p = 0.35 MPa for aqueous solutions of tetrahydrofuran at m from (0.016 to 2.5) mol · kg−1, dimethyl sulfoxide at m from (0.02 to 3.0) mol · kg−1, 1,4-dioxane at m from (0.015 to 2.0) mol · kg−1, and 1,2-dimethoxyethane at m from (0.01 to 2.0) mol · kg−1. Values of Vϕ were determined from densities measured with a vibrating-tube densimeter, and values of Cp,ϕ were determined with a twin fixed-cell, differential, temperature-scanning calorimeter. Empirical functions of m and T for each compound were fitted to our Vϕ and Cp,ϕ results.