酒精體積問題?該如何計算? - 酒精
By Ingrid
at 2007-07-16T00:00
at 2007-07-16T00:00
Table of Contents
請教酒精在汽化後的體積會是液態時的幾倍??
舉例: 1g的液態酒精汽化成氣體時體積會變成多少??
舉例: 1g的液態酒精汽化成氣體時體積會變成多少??
Tags:
酒精
All Comments
By Olga
at 2007-07-20T03:55
at 2007-07-20T03:55
無色透明液體,有異香,比重0.7893(d204),
蒸氣密度1.58 (空氣=1),沸點78.325℃(760mmHg),
熔點-114.5℃,臨界溫度243.1℃,臨界壓力62.96 atm,
引火點12.8℃,發火點392℃,
爆炸界限:下限3.3,上限19 vol%,蒸氣壓14mmHg (19℃),
燃燒熱:326.6 Kcal/mol,蒸發熱:10.337 Kcal/mol (20℃),9.304 Kcal/mol(b.p.),溶解熱-2.67 Kcal/mol。
酒精與空氣的比重是1.58,而空氣的密度是1.29 g/L。
所以酒精蒸汽的密度=1.58*1.29= 2.0382 g/L = 0.0020382 g/cm3
酒精的密度=0.79 g/cm3
故汽化後之酒精是液態的 0.79/0.0020382 = 387.6 倍!
2007-07-16 13:49:33 補充:
1g酒精汽化後體積 = 1/0.0020382 = 490.63 cm3
By Hedy
at 2007-07-19T02:07
at 2007-07-19T02:07
By John
at 2007-07-16T01:13
at 2007-07-16T01:13
酒精分子量 46
所以 1g/46g x 22.4 = 0.486957 公升 (理論值)
實在值 要看環境因素~
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