Heats of combustion and isomerization of six pentadienes and spiropentane
Heats of combustion and isomerization of six pentadienes and spiropentane
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六种戊二烯和螺戊烷的燃烧热和异构化热
DOI：
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发表时间：
1955
期刊：
影响因子：
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通讯作者：
E. Prosen
中科院分区：
文献类型：
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作者：
Frances M. Fraser;E. Prosen
六种异戊烯和螺戊烷的燃烧热是通过氦气携带的烃蒸气在恒压火焰中燃烧来测量的;反应是在量热计中的玻璃反应容器中进行的。用电能校准量热计系统。实验数据得到了以下标准燃烧热的值，tfic 0，在25° C和恒定压力下，气态烃在气态氧中形成气态二氧化碳和液态水，所有反应物和产物都处于热力学标准参考状态，以千卡/摩尔计，其中1千卡= 4。1840千焦：1，2-戊二烯，777.14 ± 0.15 ; 1，顺式-3-戊二烯，763.30 ± 0.21 ; 1，反式-3-戊二烯，761.64 ± 0.15 ; 1，4-戊二烯，768.94 ± 0.30 ; 2，3-戊二烯，775.32 ± 0.16 ; 2-甲基-1，3-丁二烯（异戊二烯），761.62 ± 0.23 ;螺戊烷，787.77 ± 0.17。从上述数据计算异构化为异戊二烯的热量，以千卡/摩尔计，为2-甲基-1，3-丁二烯。（异戊二烯）= 0 ; 1，2-戊二烯= 15.52 ± 0.23 ; 1，顺-3-戊二烯=1.68 ± 0.27 ; 1，反-3-戊二烯=-0.02 ± 0.22 ; 1，4-戊二烯= 7.32 ± 0.34 ; 2，3-五烯=13.70 ± 0.23;螺戊烷=26.14 ± 0.24。生成热和氢化热的值也来自这些elata。
The heats of combustion of six pentadienes and spiropentane were measured by combustion of t he hydrocarbon vapors, carried by helium gas, in a fl ame at constant pressure ; the reaction was carried out in a glass reaction vessel contained in a calorimeter. The calorimeter system was calibrated by means of electric energy. The experimental data y ielded the following values for the standard heat of combustion , t;Fic O, at 25° C and co nstant pressure, of the gaseous hydrocarbon in gaseous oxygen to form gaseous carbon dioxide and liquid water, with a ll the reactants and products in t heir t hermodynamic standard reference states, in kilocalories per mole, where 1 k cal= 4. 1840 kj: 1,2-pentadiene, 777.14 ± 0.15 ; l ,cis-3-pentadiene, 763.30 ± 0.21 ; 1,trans-3-pen tad iene, 761.64 ± 0.15 ; 1,4-pentadiene, 768.94 ± 0.30 ; 2,3-pentadiene, 775.32 ± 0.16 ; 2-methyl-1,3butadiene (isoprene), 761.62 ± 0.23 ; spiropentane, 787.77 ± 0.17. From t he above data t he heats of isomerization to isoprene in kilocalories per mole were calculated to be 2-methyl-1 ,3-bu tadiene (isoprene) = 0 ; 1,2-pentadiene= 15.52 ± 0.23 ; l ,cis-3-pentadiene=1.68 ± 0.27 ; 1,trans-3-pentadiene=-0.02 ± 0.22 ; 1,4-pentadiene = 7.32 ± 0.34 ; 2,3-pentael iene=13.70 ± 0.23; spiropentane=26.14 ± 0.24. Values of the heats of formation and hydrogenation were also derived from these elata.