Roasting Thermodynamics

In conversations with a roaster.
I haven't heard of people measuring
1) mass, and
2) volume
existing from the drum. That would be some pretty hardcore data...
And as for estimating specifically the mass of water lost at any point in a batch of beans... tough luck...
we lose both water, and miscellaneous organic stuff that got gasified... and then we gain some oxygen from stuff that was air-burnt, and gaahahh

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