Specific enthalpy increments for propan-1-ol at temperatures up to 573.2 K and 11.3 MPa

Near-critical measurements of enthalpy increments for benzene: a new flow calorimeter for the measurement of near-critical enthalpy increments

“…FIGURE 7. Enthalpy increments h for benzene at high pressures plotted against pressure p. The continuous curve was calculated from the Goodwin equation of state (12) and the broken curve was calculated from the Bender (13) equation of state with parameters fitted by Polt et al (14) •, 561.75 K. Also shown in this figure are enthalpy increments at T = 561.8 K measured using the vertical calorimeter (9) described previously. Agreement between the two sets of measurements is within ±0.5 per cent.…”

“…These enthalpy increments were found to be in close agreement with values listed in the NBS/NRC steam tables, (3) the mean deviation of the 90 measurements was −0.03 per cent. The calorimeter has been used to make measurements on n-hexane, (1) benzene, (2) methanol, (4) ethanol, (5) propanone, (6) (propanone + n-hexane), (7) (propanone + benzene), (8) (water + methanol), (9) and (water + ethanol). (10) These measurements are relevant because for all fluids it was found that enthalpy increments extrapolated to zero pressure were in agreement with ideal gas enthalpies calculated from spectroscopic measurements.…”