110年 - 110 國立高雄大學_碩士班招生考試_化學工程及材料工程學系：普通化學#102935

1. What is the greenhouse effect? Explain why the coldest temperatures in winter always occur on clear nights.

2. The reaction of ethane gas (C₂H₆) with chlorine gas produces C₂H₅Cl as its main product (along with HCl) and a variety of other minor products. Calculate the percent yield of C₂H₅Cl if the reaction of 300. g of ethane with 650. g of chlorine produced 490. g of C₂H₅Cl. (atomic mass: C, 12.01； Cl, 35.45； H, 1.008)

3. Write Lewis structures and predict the molecular structures of XeF₄, SO₃, BrF₃, and IF₅. Which of these compounds are polar?

4. For the species O₂, O₂⁺ , and O₂ ⁻ , use the molecular orbital model to give the electron configuration and the bond order for each. Which has the strongest bond?

5. Draw all resonance structures for SCN⁻ . Assign the formal charge for each atom. Which resonance structure is the most stable one? Explain why.

(a) aluminum hydrogen sulfate

(b) ammonium hydrogen phosphate

(c) potassium hypochlorite

(a) What is the vapor pressure of the resulting solution?

(b) What is the composition by mole fraction of pentane in the vapor that is in equilibrium with this solution?

8. What are London dispersion forces and dipole-dipole forces respectively? Please give an example for each.

(a) SeO₂ or SO₂ ,

(b) CH₃OH or H₂CO

10. Calculate the [H⁺ ] of a 1.0 L solution that contains 0.50 M NH₃ and 0.80 M NH₄Cl. Then, calculate the [H⁺ ] of the solution after the addition of 0.20 mole of gaseous HCl?

11. For a coordination compound [Pt(NH₃)₃Br]Cl, indicate the complex ion, ligand, and the counterion of the complex ion. What is the coordination number and oxidation state of platinum ion?

12. A galvanic cell is based on the following half-reactions:

The cell runs spontaneously. Write and balance the overall redox reaction and calculate the ε° (cell potential) and ΔG° (free energy).

110年 - 110 國立高雄大學_碩士班招生考試_化學工程及材料工程學系：普通化學#102935

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