- 01 Apr, 2021
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A Closer Look at Trends in Boiling Points of Hydrides: Using an Inquiry-Based Approach To Teach Intermolecular Forces of Attraction
– Write two-page summary of what do you learn from this article? Where do you see it fits in your day to day life?
Answer the following questions:
1. What does the number of electrons on x-axis of Figure 1 represents? (Are these valence electrons? Core electrons?) How do you know.
2. It is clear from Figure 1 that the boiling point of hydrides of group 14 increases as the number of electrons increases. Explain this observation.
3. Sketch in figure 1 where would you expect the boiling point of group 16 hydrides (H2S, H2Se, H2Te) to be and explain your choices.
4. In the figure 2 below sketch (predict) where would you expect the boiling point of NH3 be.
5. Does the boiling point of NH3 follow the regular trend? Explain your response.
6. Consider a single H2O molecule. What is the maximum number of H-bonds that can be formed with other H2O molecules? What is the maximum number of H-Bonds can be formed between a single NH3 molecule and other NH3 molecules? Sketch all of the H-bonds in both cases.
7. Does your rsponse to question 6 helps you to explain why boiling point of H2O ( 373K) is much higher than that of boing point of NH3 ( 240K)? Explain.