@sub_o said:
- In the last podcast, Brad mentioned about drinking alcohol / beer with straw will make you drunk faster. This is probably true. Because, by drinking with straw, we're creating vacuum, lowering pressure rapidly. With very low pressure, water and alcohol can boil within room temperature. By drinking with straw, alcohol will rapidly evaporate and rather than being absorbed in our intestine, it will be inhaled thru lung. Thus speeding up the spread of the alcohol in the blood circulation.
I'm gonna have to argue with this one, or at least ask for a proper citation. I don't buy your explanation at all. When you drink through a straw, you are absolutely not creating a vacuum! This is a common mistake, saying "vacuum" when what you really mean is "create a lower-pressure zone". A vacuum has zero pressure and the human body is certainly not strong enough create one. What you are doing by sucking on the straw is lowering the pressure inside the straw, which makes the drink shoot up.
But you don't have to lower the pressure very much. The pressure difference is not that much smaller compared to the outside (drinking through a straw is, after all, very easy!). Now, it's true that water boils at a lower temperature when the pressure is lowered, and it even boils at room-temperature when the pressure is zero. But the pressure is NOT zero, it is just slightly lower! Maybe a teeny-tiny little bit more of the beer evaporates into gas, but only a really tiny amount, not significant amounts that would get you drunker faster.
If it is indeed true that you get drunker faster if you drink through a straw, Brad's explanation is far more plausible! The amount of alcohol in whatever you're drinking is directly proportional to the volume of whatever your drinking, but since you do absorb some alcohol directly in the mouth (assuming that that is true), the rate of absorption from the mouth is directly proportional to the surface area of the liquid you're drinking (since if it isn't at the surface area of the liquid, it doesn't get absorbed). So for the some amount of alcohol, how much of it is absorbed through the mouth is going to be proportional to the ratio between surface area and volume. The higher it is, the more alcohol you're going to absorb directly in your mouth, which means you get drunker faster. Since surface area is a two-dimensional quantity and volume is a three dimensional quantity, that ratio is going to be higher if you take smaller sips instead of big gulps (assuming that the small sips add up to the same volume as the big gulps), which is essentially what a straw does. I could go a little deeper into the math here, but I think I've made my point.
Now, I don't know if this is true that you get drunker faster with a straw. But if it is true, then it is far more plausible that it has to do with surface area/volume ratios and nothing to do with pressure. The pressure differential is so small as not to matter, and it's certainly not a vacuum. If it was, the beer would boil in your mouth! And you would also die, but whatever, you'd die happy.
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