乙炔
甲烷
化学
离解(化学)
分子
拉曼光谱
乙烯
催化作用
热力学
物理化学
化学物理
有机化学
物理
光学
出处
期刊:Canadian Journal of Research
日期:1932-09-01
卷期号:7 (3): 328-336
被引量:2
摘要
The specific heat at constant volume of methane, ethylene and acetylene has been computed from the vibrational frequencies involved in Raman effect and infra-red bands, and is found to agree with experiments of recent date. From the overtones of the infra-red methane band of 3022 cm −1 a heat of dissociation into probably CH 3 and H of 101 cal. per mole may be deduced. The number of collisions in which the energy could be transferred from molecule to molecule is too small, however, even at 1,000 °C., to account for the splitting up of methane into CH 3 and H in quartz tubes where in the initial stage catalytic effects are small. It is likely that the slower and the symmetrical vibrations lead to a lower level of dissociation into CH 2 and H 2 , and that the finite time during which the molecule remains in these vibrational states influences the results. The need for studying the velocity of ultrasound in gases in order to gain a better knowledge of thermal decomposition processes is pointed out.
科研通智能强力驱动
Strongly Powered by AbleSci AI