Comment by asdgfaqwrg
4 days ago
Jif creamy peanut butter comes in at 190 kcal per 33 g serving [0], and 2000 kcal is 2.32 kW-h. Doing some good old fashioned dimensional analysis, the energy density of store-bought PB is
190 kcal | 2.32 kw | 1000 g
---------+-----------+------- = 6.68 kW-h/kg
33 g | 2000 kcal | kg
So, Jif creamy is nearly 17 times as energy dense as Donut's battery. Even so, crunchy is better.
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[0] https://www.jif.com/products/creamy/creamy-peanut-butter
Right, but a jar of peanut butter is more comparable to a gas can than to a solid-stste battery. I'm sure if you measured 100% of the kcal comprising the battery in a bomb calorimeter, the source of measurements of the kcal of food, you'd end up with a significantly higher density - but wholesale combustion is the paradigm we're trying to move past, not towards.
Could you re-state those numbers but use delivered power instead of hypothetical? Assuming you can get the peanut butter to combust, I mean.