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shouldn't the known pressure at 90 degrees be 7.01x10^4 Pa not the 7.294x10^4 Pa give when working out the linear interpolation part of this problem?
Hi Craig,
Thanks for the question. Saying "pressure" is a bit ambiguous since there is "saturated vapour pressure" and "external atmospheric pressure". When saturated vapour pressure equals external atmospheric pressure, then boiling happens. In this solution we're looking for the temperature where that happens, and I referred to 7.01x10^4 Pa as "known" since it's shown in table 13-3 and we "know" it in the sense that the table tells us the temperature where saturated vapour pressure is 7.01x10^4 Pa (see video @1:34). I think we're on the same page as I completely agree with your comment, but unless there's some other part of the video where I mis-spoke, I'm also saying 7.01x10^4 Pa is known.
All the best,
Mr. Dychko
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