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2017/5/4 14:20:40來源:新航道作者:新航道
摘要:今天新航道AP小編要跟各位考生談?wù)凙P化學(xué)。這是理科生都喜歡的一門課,上海新航道AP課程培訓(xùn)中心 也開設(shè)了AP化學(xué)這門課。AP化學(xué)深受理工科學(xué)生的喜愛。如果將來留學(xué)的專業(yè)是理工科類,那么小編還是比較推薦你選擇AP化學(xué)科目的,因?yàn)橄鄬?duì)于AP物理,AP化學(xué)還是要簡單一些的。今天小編給大家?guī)砹?5道經(jīng)典常考的AP化學(xué)選擇題,趕緊來鍛煉一下吧!答案在文章結(jié)尾。
今天新航道AP小編要跟各位考生談?wù)凙P化學(xué)。這是理科生都喜歡的一門課,上海新航道AP課程培訓(xùn)中心 也開設(shè)了AP化學(xué)這門課。AP化學(xué)深受理工科學(xué)生的喜愛。如果將來留學(xué)的專業(yè)是理工科類,那么小編還是比較推薦你選擇AP化學(xué)科目的,因?yàn)橄鄬?duì)于AP物理,AP化學(xué)還是要簡單一些的。今天小編給大家?guī)砹?5道經(jīng)典常考的AP化學(xué)選擇題,趕緊來鍛煉一下吧!答案在文章結(jié)尾。
Part B
Directions: Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case and then fill in the corresponding oval on the answer sheet.
Questions 15-16 relate to the graph below. The graph shows the temperature of a pure substance as it is heated at a constant rate in an open vessel at 1.0 atm pressure. The substance changes from the solid to the liquid to the gas phase.
#FormatImgID_0#15. The substance is at its normal freezing point at time
(A) t1 (B) t2 (C) t3 (D) t4 (E) t5
16. Which of the following best describes what happens to the substance between t4 and t5?
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(A) The molecules are leaving the liquid phase.
(B) The solid and liquid phases coexist in equilibrium.
(C) The vapor pressure of the substance is decreasing.
(D) The average intermolecular distance is decreasing.
(E) The temperature of the substance is increasing.
17. In which of the following groups are the three species isoelectronic; i.e., have the same number of electrons?
#FormatImgID_1#18. The phase diagram for the pure substance X is shown above. The temperature of a sample of pure solid X is slowly raised from 10?C to 100?C at a constant pressure of 0.5 atm. What is the expected behavior of the substance?
(A) It first melts to a liquid and then boils at about 70?C.
(B) It first melts to a liquid and then boils at about 30?C.
(C) It melts to a liquid at a temperature of about 20?C and remains a liquid until the temperature is greater than 100?C.
(D) It sublimes to vapor at an equilibrium temperature of about 20? C.
(E) It remains a solid until the temperature is greater than 100?C.
#FormatImgID_2#答案:15B 16A 17A 18D 19E 20E 21B 22C 23D 24C 25A
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