What is Professor Blake's favorite molecule?

Question

BlackTom AI · Accepted Answer

Methane (CH4) exemplifies the simplest saturated hydrocarbon and therefore is a natural candidate for a favorite molecule.

1. Relevant knowledge points and concepts
- Molecular formula and structure: CH4, tetrahedral geometry, sp3 hybridization, H–C–H bond angle ~109.5°.
- Chemical significance: simplest alkane, prototype for studying covalent bonds, hybridization, and molecular symmetry.
- Practical roles: major component of natural gas (energy source), important in atmospheric and astrochemistry, a benchmark molecule in spectroscopy and computational chemistry.

2. Step-by-step reasoning
- Simplicity and pedagogical value: Because methane has only one carbon and four equivalent hydrogens, it is the standard example used to teach VSEPR, hybridization, and molecular symmetry. A professor who values clear illustrative examples would naturally favor CH4.
- Symmetry and theory: Methane’s tetrahedral symmetry makes it an ideal molecule to demonstrate group theory and degenerate energy levels; its simple electronic structure allows exacting quantum calculations.
- Practical importance: As the principal component of natural gas and a key greenhouse gas, methane connects textbook concepts to real-world energy and environmental issues—qualities a chemistry professor often emphasizes.

3. Intermediate steps / supporting facts
- Structural detail: carbon forms four equivalent sp3 orbitals; each overlaps with a 1s orbital of hydrogen to form four σ bonds.
- Experimental accessibility: methane spectra (IR, Raman) are well-characterized, so it’s widely used in labs and research.

4. Why the correct answer is correct
Methane uniquely combines theoretical clarity, experimental tractability, and practical relevance among the choices; these are common reasons an instructor would single it out.

5. Why other options are incorrect
- Ethane (C2H6): larger and less pedagogically minimal than methane.
- Benzene (C6H6): important, but aromaticity is more advanced and benzene is planar and less “simple.”
- CFC-12 (CCl2F2): historically important but environmentally harmful and less pedagogically fundamental.
- Chloroform (CHCl3): historically used as anesthetic but toxic and not as structurally fundamental.

Conclusion: Given these points, the favorite molecule is Methane, which matches the provided answer.

What is Professor Blake's favorite molecule?单项选择题

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