Saturated vapor pressure, ln(p/Pa)=(-21316±511)/(T /K)+(41.64±0.11), and enthalpy of sublimation of orotic acid, ${\mathrm{\Delta }}_{\mathit{sub}}{H}_m^0(T_m)$ = 177 ± 4 kJ/mol, were determined by means of Knudsen effusion mass spectrometry in the temperature range of 423÷493 K. The computational approaches supported the experimental results reported. The theoretical estimation of the gas-phase enthalpy of formation for orotic acid was done with different working reactions used.

中文翻译：

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从实验和计算数据确定在乳清酸情况下升华的摩尔焓焓

饱和蒸气压ln（p / Pa）=（-21316±511）/（T / K)+ ( 41.64 ± 0.11）和乳清酸的升华焓，${\mathrm{\Delta }}_{\mathit{子}}{H}_{米}^0（{Ť}_{米}）$在423÷493 K的温度范围内，通过Knudsen渗流质谱法确定了177±4 kJ / mol。计算方法支持了所报道的实验结果。对乳清酸的气相生成焓的理论估算是通过使用不同的反应进行的。