The enthalpy of formation of ketene

Ketene Thermochemistry

“…In conjunction with well established enthalpies of formation, (see Table 1), these yield À47.5 AE 1.4, 49.0 AE 2.3, À48.5 AE 2.8 and À48.6 AE 4.0 leading to a weighted average of À48.2 AE 2.6 kJ mol À1 (here and elsewhere, errors are reported at the 95 % confidence level). This is in excellent agreement with the very early adiabatic solution calorimetry measurement of Nuttall et al [10] of À48 AE 2 kJmol…”

Methylene singlet–triplet energy splitting by molecular beam photodissociation of ketene

“…From the known heats of formation of CH 2 CO (.Hf = -10.7 kcal/ 2 fo mole) 17 and CO (LHfo = -27.199 kcal/mole), 18 This distribution was used to fit the data for the CO fragment at lab angles of 14' and 17'. The actual parameters are given in Table I.…”

Enthalpies of reaction of tris(hydroxymethyl)aminomethane in HCl(aq) and in NaOH(aq)

“…In an earlier investigation whe re th e e nth alp y of reaction of gaseous ke te ne in aqueous NaOH was measured [8], it was necessary to make th e calori meter sufficiently gas-tight so that the gaseous produc ts could be collected and analysed. Following that investigation the reaction of TRIS in 0.1 N HCI was measured as a check on the performance of the calorimeter.…”