vaporization latent heat
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Is the latent heat of vaporization related to molecular weight?
There is no absolute relationship, or rather, no proportional relationship. To ask this question, the temperature must first be fixed. For example, in the case of water and oil, the molecular weights are quite obvious, but their latent heats differ significantly. If you say they are all alkanes, then there might still be a certain proportional relationship.
It’s related to external pressures quite a lot, and I think it’s also connected to certain inherent properties as well; I’m not sure how to put it
There is no direct relationship; for example, the molecular weight of water is only 18, yet its latent heat of vaporization is quite high, at around 2000 kJ/kg, while that of oils is generally lower, only a few hundred kJ/kg.