Martini Chemistry: Debating Alcohol Bruising & Chemical Reactions

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Discussion Overview

The discussion revolves around the concept of "bruising" alcohol, particularly gin, in the context of shaking a martini. Participants explore whether shaking can lead to chemical reactions that alter the alcohol's composition, the effects of temperature and dilution on flavor, and the interactions between ice, air, and alcohol during the shaking process.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants question whether shaking gin in a martini shaker can lead to chemical changes in the alcohol's makeup, particularly in relation to aldehydes and air exposure.
  • Others argue that the primary difference between shaken and stirred martinis lies in the chilling and dilution effects, with shaking cooling the drink faster without significant dilution.
  • A participant expresses skepticism about the existence of any chemical reactions occurring during shaking, suggesting that the debate remains unresolved.
  • There is a query about whether ice at temperatures below 0 degrees Celsius interacts differently with ethanol compared to ice at 0 degrees Celsius.
  • One participant asserts that freezing an aqueous ethanol solution results in ice and liquid ethanol, emphasizing that significant reactions between air, alcohol, and water are unlikely at lower temperatures, though a slight pH change may occur.
  • Another participant highlights that shaking increases energy distribution and heat transfer, suggesting that the temperature gradient affects the melting of ice in the shaker.

Areas of Agreement / Disagreement

Participants express differing views on the potential for chemical reactions during shaking, with some asserting that no significant reactions occur, while others remain open to the possibility. The discussion does not reach a consensus on the chemical interactions involved.

Contextual Notes

Participants note that the discussion is limited by assumptions about the nature of the interactions between ice, air, and alcohol, as well as the effects of temperature on these interactions. The complexity of the chemical dynamics involved remains unresolved.

medshredr
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Is there any validity to the long debated topic of bruising alcohol, specifically gin in an ice filled martini shaker? Can gin or any other alcohol react and change it's chemical make up by this shaking? Can air introduced by the shaking react with the alcohol and affect the flavor by reacting with the aldehydes? Is there really a chemical reaction or is it simply a colloidal suspension of air and tiny ice particles?
 
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As far as I remember, the basic difference between shaken and stir maritini is the chilled and dilution factor. Shaken method cools the martini faster and does not dilute (due to melting ice) the martini as much as a stir martini.

This will ultimitely affect the interaction of taste bud and the molecules. It is the same principle with red and white wine. Temperature will change the taste of wine.
 
Thank you for the insight but can you address any possible chemical reaction between the liquor, ice, and air with the kinetic energy and agitation of the shaking? I don't believe there is one however the topic is still hotly debated.
 
On the same topic, does ice that is colder than 0 degrees celsius interact any differently with ethanol than ice at 0 degrees celsius?
 
I'm pretty sure that a liquid solution of aqueous ethanol, when frozen sufficiently will simply yield ice and liquid ethanol; although this freezing point will be lower than 0 degrees (freezing point depression).

I don't believe that any of your queries pertain to chemical reactions (not any that I've heard of), air, alcohol, and water do not react significantly especially at lower temperatures...although there may be a slight pH dynamic.

Overall, iansmith hit the spot. Shaking expedites the cooling, the details are not so important...you're simply speeding up the energy distribution process. Heat (assuming a closed container) transfer is in the direction of lower temperature medium to the higher. The greater the distinction in temperatures, the faster the heat transfer. A temperature gradient as such that would exist if the martini/ice were left alone, will have a lower rate of heat transfer, enough so that the room temperature itself would have had quite a role in melting the ice.
 

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