下列物質在-50 ℃下呈液狀，試排列出其蒸氣壓增加順序：dimethyl ether(CH3OCH3)、ethanol(CH3CH2OH)、propane(CH3CH2CH3)(A) etha

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20. 下列物質在-50 ℃下呈液狀，試排列出其蒸氣壓增加順序：dimethyl ether(CH3OCH3)、ethanol(CH3CH2OH)、propane(CH3CH2CH3)
(A) ethanol ＜ propane ＜ dimethyl ether
(B) propane ＜ dimethyl ether ＜ ethanol
(C) ethanol ＜ dimethyl ether ＜ propane
(D) dimethyl ether ＜ ethanol ＜ propane

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