# Does a bottle of soda go flat faster if refrigerated **URL:** \ **Category:** Factual Questions\ **Created:** [September 24, 2024, 4:42pm UTC](https://boards.straightdope.com/t/does-a-bottle-of-soda-go-flat-faster-if-refrigerated/1007668 "2024-09-24T16:42:50Z")\ **Posts on this page:** 1\ **Showing post:** 33
**Author:** ![Machine\_Elf](https://avatars.discourse-cdn.com/v4/letter/m/82dd89/32.png) [@Machine\_Elf](https://boards.straightdope.com/u/Machine_Elf)\ **Post date:** [September 25, 2024, 7:15pm UTC](https://boards.straightdope.com/t/does-a-bottle-of-soda-go-flat-faster-if-refrigerated/1007668/33 "2024-09-25T19:15:21Z")
> [@Dr.Strangelove](#): > > Not necessarily true. CO2 is a heavy gas and may well sit in a layer above the soda even when uncapped. It’ll be strongly dependent on airflow, etc. in the fridge, though. Probably not, depending on how long you leave it: > [@how strong is the tendency for stratification in gas mixtures?](https://boards.straightdope.com/t/how-strong-is-the-tendency-for-stratification-in-gas-mixtures/788932): > > The atmosphere is composed primarily of oxygen and nitrogen. These gases have different molar weights; molecular diffusion and bulk convection endeavor to keep them homogenously mixed, but gravity, working on their different molar weights, endeavors to stratify them, with the heavier molecules at the bottom of the pile. So how strong is the tendency toward stratification? If I eliminate bulk convection by enclosing a quiescent volume of air in a room-sized chamber with all surfaces at one con… --- _[View the full topic](https://boards.straightdope.com/t/does-a-bottle-of-soda-go-flat-faster-if-refrigerated/1007668)._