Re: 70 to 25 in 48 hours, moving air, water
- To: perennials@mallorn.com
- Subject: Re: 70 to 25 in 48 hours, moving air, water
- From: "* L* P* <d*@olympus.net>
- Date: Thu, 12 Mar 1998 19:52:39 -0800
- References: <01bd4e1b$e0be66e0$dbbbcdcf@hal-s-pc>
Hal Lanktree wrote:
>
> For what its worth, one must absorb 1 calorie of heat to lower the
> temperature of 1 gram of water by 1 degree. But it takes the absorption of
> 80 calories of heat to freeze that gram to ice, and it gives back off 80
> calories again when it melts. When the gram of water is coating a bud, the
> bud gets the benefit of the 80 calories before either the water or the bud
> can freeze.
>
> -----Original Message-----
> From: dorsett <dorsett@kiva.net>
> To: perennials@mallorn.com <perennials@mallorn.com>
> Date: Thursday, March 12, 1998 7:20 PM
> Subject: Re: 70 to 25 in 48 hours, moving air, water
>
> >>Isn't this what's called sublimation/
> >
> >Nope. Sublimination is when a material goes directly from a solid to a
> >gaseous state...like dry ice turning into gaseous carbon dioxide.
> >
> >>At any rate, you intuitively know this. Take a glass of water that's
> >>been in the fridge and is below 40F. Take a glass of water that's been
> >>sitting on the counter at 70F. Put in freezer. It takes a *heck* of a
> >>long time to freeze the 40F water -- much longer than bringing the 70F
> >>down to 40F. Same goes from moving the Thanksgiving turkey into the
> >>fridge from the freezer -- takes *forever* to thaw.
> >
> >That's heat of fusion.....the stage where water turns into ice (and ice
> >into water) stores up (or releases) a few calories of energy during the
> >process of changing between solid and liquid states of matter.
> >
> >Barb in Southern Indiana Zone 5/6 <dorsett@kiva.net>
> > Midwest Gardener http://www.suite101.com/topics/page.cfm/430
> > Suite 101 http://www.suite101.com
> > Gardening splash page
> http://www.suite101.com/userfiles/79/gardening.html
> > A root is a flower that disdains fame.
> >
> >---------------------------------------------------------------------
Alright....is this 'Physics@mallorn.com' or WHAT??
:}
--
The Greenhouse Nursery
81 S. Bagley Creek Road & Hwy 101
Port Angeles, WA 98362
(360) 417-2664
Zone 8
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