From: marty@wavemark.com
Date: Wed Dec 18 2002 - 16:05:30 CST
It's not that you try to heat it above the boiling temp (195 F, in
your example). It's that you want to keep the water boiling at 195 Fn
for one minute, or four minutes, or ten mnutes in order to kill all
the little giardas really dead. The 1/4/10 minutes depends on who
you're talking to, and the probability you can handle of one or two
giardia babies living through this.
-- -Marty Galligan WaveMark Solutions, Motorola, Burlington, MA marty@mail.wm.sps.mot.com 1-781-852-2785 | Sender: owner-philmont@troop47.com | Reply-To: philmont@troop47.com | Date: Wed, 18 Dec 2002 16:28:13 -0500 (EST) | From: <p2ranger@anvilgear.com> | X-Priority: 3 | Importance: Normal | X-SLUIDL: 86A6D7F0-4159469A-8FA97700-C7B70295 | X-MDRemoteIP: 207.177.12.7 | X-Return-Path: owner-philmont@troop47.com | X-MDaemon-Deliver-To: marty@wavemark.com | | | > Here's a chart - http://www.fetco.com/boilingpoint.htm - as a reminder | > that you do need to give water in the mountains a couple of extra | > minutes. | > | ----------------------------- | My Thermodynamics is a bit rusty so I pose a question. | | Once water reaches its boiling point (for what ever temperature it is for | the ambient pressure), can the liquid water go above that temperature (in | a normal environment)? I know you can superheat steam, but can that be | achieved with a stove and a beat up pot? | | I ask this because I've never agreed or understood why some people say to | let it continue to boil past its boiling point temperature as if you can | make the water hotter. I welcome someone to prove this to me as I have | wondered about it for a long time. | | It would seem to me that if your boiling point for the pressure you are at | (I say presure because that is more important than measuring your | altitude) is 195F, in order to get your water above that temperature, | would you not have to convert all your water to steam and then continue to | heat the steam? I say this because I haven't seen many pots that hold | their steam well :) | | So if this is correct, then why do some people recommend you continue to | add heat to the system when the temperature can't really be increased any | more. Or am I just wrong? | | Jason | ><> | Retired Ranger | | | | | | | | ------------------------------------------------------- | Scouting E-mail Discussion Lists @ usscouts.org | Subscribe/Unsubscribe at http://usscouts.org/lists/ | Listserv Commands at http://usscouts.org/lists/lc.asp | ------------------------------------------------------- | Send listserv commands to: listserv@troop47.com | Send postings to: philmont@troop47.com | List FAQ found at: http://usscouts.org/lists/faq.asp | List Administrator: philmont_owner@troop47.com | ------------------------------------------------------- | As you gather around this virtual campfire with fellow | Scouts and Scouters, do your best to be trustworthy, | loyal, helpful, friendly, courteous, kind, obedient, | cheerful, thrifty, brave, clean and reverent. | ------------------------------------------------------- | | | | | | ------------------------------------------------------- Scouting E-mail Discussion Lists @ usscouts.org Subscribe/Unsubscribe at http://usscouts.org/lists/ Listserv Commands at http://usscouts.org/lists/lc.asp ------------------------------------------------------- Send listserv commands to: listserv@troop47.com Send postings to: philmont@troop47.com List FAQ found at: http://usscouts.org/lists/faq.asp List Administrator: philmont_owner@troop47.com ------------------------------------------------------- As you gather around this virtual campfire with fellow Scouts and Scouters, do your best to be trustworthy, loyal, helpful, friendly, courteous, kind, obedient, cheerful, thrifty, brave, clean and reverent. -------------------------------------------------------
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