melting point and thermodynamic product?

[yoyohomieg5432]

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is there a relationship between the melting point and the thermodynamic product? This question is from AAMC 8. pictures of question, table data, and relative passage info attached.

I reasoned that furaldehyde was the thermodynamic product because in reaction 1c which was run at high temperature (a condition for a thermodynamic product) the product had a melting temp that was 2-furaldehyde's (from table 1).

The solutions i have (from kaplan) argue that furaldehyde is the thermodynamic product because it has a higher melting point. I've never heard this argument before and don't really understand why that would be the case.

 

[yoyohomieg5432]

here's a picture of kaplan's explanation.

 

[ZeaL6]

If it is harder to melt something (aka higher melting point) then it is generally more stable, and has higher bond energy. The thermodynamic product is always the most stable