J. Connett
Mar 1, 1972
Citations
0
Influential Citations
11
Citations
Journal
The Journal of Chemical Thermodynamics
Abstract
Abstract Equilibrium constants for 2-methylpropan-1-ol + 2-methylpropanal + hydrogen have been calculated from measurements of the composition of mixtures formed by passing the vapour over a catalyst at several temperatures in the range 473 to 563 K. Equations relating the changes in enthalpy and entropy of the dehydrogenation reaction to temperature were derived from the equilibrium constants with the aid of heat capacities. By coupling these changes with other thermodynamic data, the standard enthalpy of formation and the standard entropy of 2-methylpropanal at 298.15 K were calculated to be −(215.7 ± 1.3) kJ mol −1 and (331.2 ± 1.7) J K −1 mol −1 respectively, in the gas state, and −(247.3 ± 1.8) kJ mol −1 and (238.3 ± 4.4) J K −1 mol −1 respectively, in the liquid state.