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The science of Monkey Island: can grog dissolve a metal mug that fast?

jgeekstudies.org125 points38 comments
Screenshot of The science of Monkey Island: can grog dissolve a metal mug that fast?

The piece examines whether the fictional pirate beverage grog from Monkey Island could chemically dissolve a metal tankard as quickly as shown in the game. The author treats the game observation as an inverse problem: timing the in-game puzzle gives a characteristic perforation time of about 35 seconds, the mug is identified as a pewter tankard and modelled as pure tin with a nominal wall thickness of 2 mm, and the published list of grog ingredients (kerosene, propylene glycol, sweeteners, sulfuric acid, rum, acetone, red dye No. 2, SCUMM, axle grease, battery acid, pepperoni) is surveyed for corrosion relevance. A qualitative assessment of mixture properties predicts phase separation, strong odors, possible flammability, and complex acid-organic chemistry; none of the listed organics explains the game’s intense green color.

The analysis reduces the scenario to acid-only dissolution under an idealised, diffusion-controlled limit, using the stoichiometric reaction Sn + 2H+ → Sn2+ + H2 and treating the metal surface as a perfect proton sink. Sulfuric acid (including battery acid) is identified as the primary candidate able to supply protons for tin corrosion; other ingredients are largely inert or would impede contact. The model deliberately neglects hydrogen-evolution kinetics and surface passivation to maximise proton-limited dissolution, and proceeds to calculate the proton flux and concentration requirements that would be necessary to perforate the tankard in the observed time.

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