kilopascal wrote:
>
> 2002-11-24
>
> Why 105 kPa for 1 atmosphere of pressure? What reference or experiment
> would back this up? If it is just a random number, then why not choose 100
> kPa?
I must have missed an opportunity to insert a caret in an IUPAC
cut-n-paste. Their material came out of PDF files properly formatted
but the superscripting was lost. Thus, you might have seen a "105 Pa",
which should read "10^5 Pa".
> There is also something to be said for 4�C. It is the temperature at which
> water has its maximum density of 1000 kg/m^3.
You can say all that you want to about 4 �C, John. (By the way, the
temperature for maximum water density is closer to 3.8 �C; also, I like
to put a space in there.) I don't see that IUPAC is going to change its
mind, though. After all, the most common use of "STP" is for gases.
Liquid water hardly qualifies. Besides, you're not a member of an IUPAC
organization, are you?
Jim
--
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