Excess enthalpy HE and massic heat capacity cp of (water+methanol) at temperatures between 323K and 513K and pressures up to 10MPa

Isobaric specific heat capacity of {xCH3OH+(1−x)H2O} with x=(1.0000, 0.7943, 0.4949, 0.2606, 0.1936, 0.1010, and 0.0496) at T=(280, 320, and 360)K in the pressure range from (0.1 to 15)MPa

“…Figure 6 shows the comparison of the present measurements for pure methanol at 0.1 MPa with literature data [1][2][3][4][5][6][7][8][9][10][11][12][13]. The values of Dettmann et al [14] extrapolated to p = 0.1 MPa and the constant pressure line at p = 0.1 MPa calculated by the IUPAC equation of state [15] are also plotted in this figure. Our results are in good agreement with the literature values except those of Deshpande and Bhatagadde [2].…”

“…Although our results at T = 280.00 K and p = (1 and 5) MPa are smaller than the calculated values and deviate by a greater amount than the estimated uncertainties from the calculated constant pressure lines, our other results agree with the measurements by Dettmann et al and the calculated values within the estimated uncertainties. In the case of the a calibration, natural convection in the calorimeter, which is one of the means to satisfy conditions of the lumped system, might be weakened due to increase of water viscosity at T = 280 K. Figure 8 shows the comparison of the temperature dependence of our results for (methanol + water) at p = 5 MPa with the measurements by Dettmann et al [3]; m, Benson et al [4]; ,, Benson and D'Arcy [5]; ., Villamanan et al [6]; h, Zegers and Somsen [7]; j, Costas and Patterson [8]; }, Ogawa and Murakami [9]; r, Tanaka et al [10]; g, Lankford and Criss [11]; , Andreoli-Ball et al [12]; l, Okano et al [13]; ·, extrapolated values of Dettmann et al [14]; -, IUPAC EOS [15]. figure 8, the constant pressure lines at p = 5 MPa for water calculated by the IAPWS Formulation and for methanol by the IUPAC equation of state are also plotted.…”

“…In this paper, the results of c p measurements for {xCH 3 OH + (1 À x)H 2 O} with x = (1.0000, 0.7943, 0.4949, 0.2606, 0.1936, 0.1010, and 0.0496) at T = (280.00, 320.00, and 360.00) K in the pressure range from (0.1 to 15) MPa are presented, and the behaviour of c p for the mixtures is discussed. Comparisons of the c p values for pure methanol and the (methanol + water) with the literature values [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] are also reported.…”

Isobaric Heat Capacity Measurements of Methanol by Flow Calorimeter at Elevated Temperatures and Pressures

“…The heat capacity data in the vapor phase are scarce, especially at elevated temperatures and pressures. For the liquid phase, although several literature studies − reported relatively more data, only Machado et al and Naziev et al conducted heat capacity measurement in the liquid phase for purity methanol over a relatively wide range of temperature and pressure. The remaining literature data are either too narrow in temperature and pressure range or obtained heat capacity of pure methanol from mixture measurement.…”

Excess enthalpy for the (benzene + cyclohexane) mixture over a wide range of temperature and pressure

“…For example, H E m of (water + cyclohexane) [9][10][11] and (water + benzene) [9][10][11][12] were measured for the wide ranges of the gaseous state including the super critical region near the critical loci, and H E m of (methanol + water) [13][14][15], (ethanol + water) [16][17][18][19] and (hexane + 1-hexanol) [20] mixtures were measured for wide ranges of the liquid state including the super critical region near the critical loci.…”