Re: pinhole Boiling of water

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From: Geoff Ruth (gruth@leadershiphigh.org)
Date: Thu Nov 06 2003 - 18:13:41 PST 

Message-Id: <p05210605bbd0afc7e285@[192.168.1.34]>
Date: Thu, 6 Nov 2003 18:13:41 -0800
From: Geoff Ruth <gruth@leadershiphigh.org>
Subject: Re: pinhole Boiling of water

You can do it with a vacuum pump and a bell jar. The pump my school
has is decent (but not super expensive) and water at 20 deg C boils
before the pump has removed all the air that it eventually will. So
no, you don't need to get to 0 atm to make the water boil -- in fact,
I think it's impossible to ever have zero atm of pressure. Wouldn't
you have to get something to absolute zero to have zero pressure?

>Hello,
>
>Does anyone know if there is a way to simulate a low
>pressure environment, so that one could show the
>lowered boiling point of water?
>
>Also, does one need to achieve zero atmosphere to make
>water boil without raising its temperature?
>
>Thank you very much.
>
>
>
>
>
>
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