Q2: before stopping the heating , what safety precaution should be taken? why
更新1:
第二個Q既回答係咪放吸水到tube
f.5 chem_cracking
2008-12-29 1:27 am
Q1:why is that the first few cm3 of gas coming out of the reaction tube is not collected?
Q2: before stopping the heating , what safety precaution should be taken? why
Q2: before stopping the heating , what safety precaution should be taken? why
回答 (1)
2008-12-29 1:32 am
✔ 最佳答案
Q1: It is because there is mainly air inside. Q2: The delivery tube should be removed to prevent sucking back which will crack the reaction tube.
參考: ME
收錄日期: 2021-04-19 13:18:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081228000051KK01338