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第20届国际化学奥林匹克将于1988年7月2—9日在芬兰埃斯堡和赫尔辛基举行。这次竞赛涉及无机化学、物理化学、分析化学和有机化学。这份预备题将为正式竞赛的理论与实验赛题引路开道。英文文本为其它译文的原始文本,在其它工作语言文本中任何歧义应对照英文文本为准。1988年2月25日埃斯堡第一章物理化学与无机化学1-1 画一张周期表,标明元素在环境温度与压力下的物理状态(气、液、固)。(a)为什么固态在低温下最稳定?(b)为什么气态在高温下最稳定?(c)试定性地解释周期表中元素的熔、
The 20th International Chemical Olympiad will be held on July 2-9, 1988 in Espoo, Finland and Helsinki. The competition involved inorganic chemistry, physical chemistry, analytical chemistry and organic chemistry. This preparatory question will open the way for the theoretical and experimental competitions of the official competition. The English text is the original text of other translations. Any ambiguity in the texts of other working languages shall prevail over the English text. February 25, 1988, Espoo, Chapter 1 Physical Chemistry and Inorganic Chemistry 1-1 Draw a periodic table that indicates the physical state of the element under ambient temperature and pressure (gas, liquid, solid). (a) why is the solid state most stable at low temperatures? (b) why is the gas state most stable at high temperatures? (c) qualitatively explaining the melting of elements in the periodic table,