查询词典 molar volume

Influences of the reaction time,molar ratio,type of solvents and their volume on the yield of alcoholysis products are investigated.

探索了反应时间、物料摩尔比、溶剂种类和用量对醇解产物收率的影响。

The optimum conditions were determined as follows:the molar ratio of butyraldehyde to glycol was 1∶1.6,the mass ratio of catalyst to reactants was 0.4%,the volume of cyclohexane as the water-carrying agent was 10 mL,and the reaction time was 60 min.

结果表明，磷钨钼杂多酸对合成丁醛乙二醇缩醛有较好的催化活性，适宜的反应条件如下：n∶n=1∶1.6、催化剂用量为反应物料总质量的0.4%、带水剂环己烷用量为10 mL、反应时间为60 min。

The experimental results show that the transfer volumes for these amino acids from water to sodium acetate, sodium butyrate, sodium caproate, sodium caprylate and guanidium hydrochloride solution are positive and increase with the increasing concentration of denaturant The standard partial molar transfer volume of zwitterionic end group (NH〓, CO0〓) are larger positive values and the corresponding values of methylene group CH〓 are smaller and negative.

实验结果表明，氨基酸从水到乙酸钠、丁酸钠、己酸钠、辛酸钠和盐酸胍水溶液的标准转移偏摩尔体积为正值，且随变性剂浓度的增加而增大；氨基酸的两性端基的标准转移偏摩尔体积为较大的正值，而CH〓基团标准转移偏摩尔体积为较小的负值。

Based on the orthogonal experiment, the optimum synthetic conditions for dimethyl fumarate were as follows: the molar ratio of carbinol to fumaric acid was 6∶1, mass of the catalyst was 1.0%, the volume of the water removing reagent benzene was 10 mL, and the reaction time was 3 h.

催化合成富马酸二甲酯的最佳条件为： n∶ n=6∶1，催化剂用量为1.0%，带水剂苯用量为10 mL，反应时间为3 h，催化剂重复使用7次，酯化率大于90%。

Deformation greatly promoted carbonitride isothermal precipitation and made C-curve shift leftwards. The position and shape of C-curve depended on the content of Nb and N to a great extent, C-curve shifted leftwards a little when N content increased and its nose temperature was raised with Nb content increased. 3 when cooling rate increased, start temperature and finish temperature of continuous cooling precipitation decreased, full precipitation became difficult to take place, the volume fraction of carbonitride precipitation decreased, molar fraction of Nb and C dissolved in austenite increased, and the precipitation grain was further refined. Deformation shorten precipitation start time during continuous cooling, raised precipitation start temperature, accelerated precipitation kinetics of carbonitrides.

计算表明：1在Fe—Nb—C系统中，随着温度的降低，析出相的平衡体积分数增加，溶解在奥氏体中的Nb、C的摩尔分数降低，析出相中C和Nb的原子分数的比值v增加；2变形大大促进了碳氮化物的等温析出，使C曲线左移，Nb和N的含量与C曲线的位置和形状有一定的关系，N含量的增加，使C曲线略有左移，而Nb的含量的增加使得C曲线的鼻子区上移；3随着冷却速率的增大，连续冷却析出的开始温度和结束温度均有所降低，并且析出变得越来越不充分，析出相体积分数明显减小，溶解在奥氏体中Nb和C的摩尔分数增大，析出相粒子被明显细化，变形大大缩短了CCP过程碳氮化物析出的开始时间，提高了析出的开始温度，促进了析出动力学。

The calculated molar heat capacity at constant volume is shown to be much different than that at constant pressure.

结果表明：液体的内压达到100MPa数量级，从而导致液体摩尔定容热容与摩尔定压热容存在很大差异。

The results show that the molar heat capacity at constant volume should not be replaced by that at constant pressure for liquids.

因此得出结论：用液体摩尔定压热容的值代替摩尔定容热容的做法是错误的。

Replacing the liquid molar heat capacity at constant volume by its molar heat capacity at constant pressure causes a relative error from 17%to 56%.

若以摩尔定压热容的值代替摩尔定容热容，在上述13种液体中的误差为17%～56%范围以内。

In addition, the constant-volume combustion heat of MPC was determined as -25432.72 J·g~(-1) by a oxygen bomb calorimeter at 298.15 K, and its standard molar combustion enthalpy and standard molar enthalpy of formation were calculated as -3868.92 kJ·mol~(-1) and -422.33 kJ·mol~(-1), respectively.

同时本文测定了MPC的恒容燃烧热为-25432.72 J·g~(-1)，并计算出MPC的标准摩尔燃烧焓为-3868.92 kJ·mol~(-1)及标准摩尔生成焓为-422.33 kJ·mol~(-1)。

The correlation coefficient of retention time the molecular radius or molar volume, the dipole moment, the sum of negative Mülliken charges and LUMO are more than 0.9957 using multiple linear regression.

用保留时间与分子的半径或分子的体积、分子的偶极矩、分子中总的Mülliken负电荷、分子的最低空轨道能量作多元回归分析，相关系数大於0.9957。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。