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*From*: rjensen@ualberta.ca*Date*: Wed, 15 Oct 2014 14:02:16 -0600

The SI unit of pressure is the pascal -- not commonly used.

The metric near-equivalent of atmospheres is the bar.

1 bar = 10^5 Pa = 100 kPa

ISO and IUPAC changed the standard state from 1 atm to 1 bar in 1982.

The only chemistry textbook I have seen that uses bar in is mine; all

the rest still use atmospheres.

Dr. Roy Jensen

(==========)-----------------------------------------¤

Lecturer, Chemistry

E5-33F, University of Alberta

780.248.1808

On Wed, 15 Oct 2014 19:01:57 +0000, you wrote:

As another wrinkle, we often teach students that it is "best" to always use "standard" units. Eg if you measure in m, kg, and s, your answers will come out in N, J, & W. So if you want your later calculations to come out in "appropriate" units, measuring in meters is most "appropriate"!

-> > 2. Which of the following units would be most appropriate for

-> > measuring the length of a pen?

-> > A: Miles

-> > B: Meters

-> > C: Micrometers

-> > D: Centimeters

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