[試題] 99上 周必泰 普通化學丙 第三次小考

[shokanshorin (上官薔凜)]

課程名稱︰普通化學丙
課程性質︰必修
課程教師︰周必泰
開課學院：醫學院
開課系所︰醫學系
考試日期（年月日）︰100/01/05
考試時限（分鐘）：30分
是否需發放獎勵金：是
（如未明確表示，則不予發放）

1.Explain two types of defects created in crystalline ionic solids.
 (1)Schottky defects & (2)Frenkel defects (10)

2.The band gap in aluminum phosphide (AlP) is 2.5 electron-volts
 (the charge of electron is 1.6 x 10^-19 Coulomb.)
 What wavelength of light is emitted by an AlP diode? (10)

3. A. Use the vand model to explain how conductors and semiconductors
      differ as to the effect of temperature on electrical conductivity.(10)
   B. Using silicon semiconductors as a model, define the n-type and
      p-type semiconductors.(10)

4. (Give a phase diagram of water)
   The phase diagram for water in a close system is shown below, in
   which points A-F represent the condition of water at a specific
   pressure and temperature. Please answer the following questions.

   1. Where is triple point? And how many degree of freedom in triple
      point? (5)
   2. Which point indicates that the density of gas and liquid is
      identical? (5)
   3. Which point represents the solid-liquid-gas equilirium? (5)

   4. Explain the negative slope for the line B-E.(5)


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