Enthalpy of solution of carbon dioxide in (water + monoethanolamine, or diethanolamine, orN-methyldiethanolamine) and (water + monoethanolamine + N-methyldiethanolamine) atT = 298.15 K

Abstract Measurements of the enthalpy of solution for carbon dioxide in (water  +  monoethanolamine, or diethanolamine, or N -methyldiethanolamine) and in (water  +  monoethanolamine  + N -methyldiethanolamine) at T =  298.15 K have been made by isothermal displacement calorimetry. The estimated uncertainty is between  ± 1 and 2 per cent. The results are compared with previous measurements made by isothermal flow calorimetry, isoperibol calorimetry and values derived from solubility measurements.