A precision differential flow calorimeter the excess enthalpy of benzene + cyclohexane between 280.15 K and 393.15 K

Excess enthalpies for (water + ethanol) atT= 398 K toT= 548 K andp= 15 MPa

“…In a previous publication (7) we reported a new high temperature-high pressure differential flow mixing calorimeter of design similar to that reported by Elliott et al (8) The calorimeter is capable of operation up to T=700 K at pressures of 20 MPa. It was used to measure H E m for {xH 2 O+(1−x)CH 3 OH} at temperatures up to 548 K and pressures of 20 MPa.…”

Excess enthalpies for (methanol, or propan-1-ol+acetonitrile+ propanone) at the temperature 298.15K

“…(8) Our results for (benzene + cyclohexane) agreed well with literature values. (10,11) A flow microcalorimeter at T = 298.15 K was used to measure the H E m of the two ternary mixtures. (9) The experimental errors of measured variables were ±5 · 10 −3 · H E m in H E m , ±1 · 10 −4 · x in liquid mole fraction x, and ±10 mK in temperature T .…”

Microflow calorimeter design for heats of mixing

“…A relatively crude procedure based on addition of screens was subsequently incorporated by Wormald (1977) in a gas microflow calorimeter. The correction by Elliot and Wormald (1976) for the change of enthalpy with pressure is, however, incorrect and inconsistent with their assumption of zero excess volume.…”

“…Remarkably, no known instrument a t present satisfactorily eliminates or compensates for frictional heating. The closest approach to proper compensation to eliminate frictional heating from the equipment response is that of Elliot and Wormald (1976). These authors employed mercury manometers and attempted to compensate for unequal pressure drops in the supposedly identical calorimeter sections by calculation.…”