The enthalpy of formation of dicesium monoxide (Cs2O)

Abstract A sample of high-purity Cs 2 O(c) was especially prepared for a solution-calorimetric study of its enthalpy of reaction with excess water to form CsOH(aq). The standard enthalpy of formation, ΔH f o (Cs 2 O, c, 298.15 K), was derived to be −(82.69 ± 0.28) kcal th mol −1 .