更新1: But it had 2 mole in the pound from the equation... since this is the enathalpy change of formation is it necessary to /2 in the calculation?i'll wer in more details. 2H2S(g) +3O2 (g) ---> 2H2O (l) + 2SO2 (g) ︿︿ ｜｜ ｜｜ (1/4)S8(s) ...
The enthalpy of formation of several species intervening in the atmospheric chemistry of sulfur compounds (SH, H2S, SO, HSO, SOH) have been calculated using density functional theory with correlation consistent basis sets and extrapolation to the complete basis set limit. Excellent agreement with ...
Gas-phase O–H homolytic bond dissociation enthalpy in phenol, DH298°(C6H5O–H), is still disputed, despite a large number of experimental and computational studies. In estimating this value, the experimental enthalpy of formation of phenol, ΔfH298°(C6H5OH, g) = −96.4 ± 0.6 kJ/...
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化學加成律 addition law of thermochemistry。其實不只反應熱遵循黑斯定律,所有伴隨化學反 應所發生的能量變化都遵守黑斯定律,自由能以及亂度也都可以相加減。 標準生成熱 standard heat of formation 由於實驗只能測量熱能變化量,無法測量某個物質的熱含量,所以必須有一個公定的基 準來作參照。化學家們約定,...
Form. Name tb/°C kJ/mol kJ/mol ENTHALPY OF VAPORIZATION (continued) 6-103 HNO3 Nitric acid 83 39.1 HN3 Hydrazoic acid 35.7 30.5 HNaO Sodium hydroxide 1388 175 H2 Hydrogen -252.87 0.90 H2O Water 100.0 40.65 43.98 H2O2 Hydrogen peroxide 150.2 51.6 H2S Hydrogen sulfide -59.55 18.67 14.08 ...
Enthalpies of formation [ $ Updelta_{f} H_{(298.15{text{K}})}^{o} $ ] of the reactants and products are evaluated at the CBS-QB3, G3 and G3MP2 levels of theory, respectively. It is found that the calculated enthalpies of formation by the aforementioned three methods are in ...