Abstract

By use of a solution calorimeter the standard enthalpy of hydrolysis of P(CN)3(c) at 298.15 K has been determined as –44.9 ± 0.1 kcal mol–1 and the derived standard enthalpy of formation as 117.9 ± 6.0 kcal mol–1. The enthalpy of sublimation of P(CN)3 was determined by effusion manometry as 18.0 ± 0.7 kcal mol–1 and the P–CN mean bond dissociation energy was estimated as 84 kcal mol–1.

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