Exp 14 and sig. fig. in logarithms

[Robert Zellmer]

I've received a few questions about taking the log (log or ln) of a 
number and how
to handle the significant figures.  For right now this is in relation to 
taking the natural
log of Ps (the vapor pressure of your sample) in exp 14.  You will be 
taking the logs
of numbers in other labs and in class.  Thus, you need to know how to 
manipulate them
and deal with sig. fig. in relation to the logarithm of a number.  I 
have discussed this in
the help file for exp 14 on my class web page, found at the "Helpful 
Tidbits" link.

I have a another link covering this on my web page specifically covering 
this topic.
It's also  at the "Helpful Tidbits" link on our class web page as well 
(not Carmen).
I've included it below.  I also discuss how to handle the s.f. when 
taking the antilog
and what to do when dealing with numbers which are too big for your 
calculator display.

*Manipulating Logs and Sig. Figs.* 
<http://chemistry.osu.edu/%7Erzellmer/chem1220/faq/sig_fig_logs.txt>

Dr. Zellmer
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