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Greetings Philipoakley The classic definition ( pre circa 1956 ) of a mole was the "mass of stuff" divided by the "molecular mass" of the stuff. Since the mass could be measured in either the metric system (grams) or the english system (US) (pounds)and one pound of mass was the same as 454...

Greetings IRstuff RE: "I'm not sure why not teaching obscure units is a bad thing." Perhaps the teachers do not understand the concepts, and "why burden the kids minds". Also probably parallels why Americans are not multi-lingual. Have a great weekend Frank

Greetings IRstuff: I must agree with your conclusion about "sloppy". I only wish that PTC would issue a "FIX" for MCAD13.1 and if necessary for MCAD14 to include gmole, gmol, Lbmole and remove "mol" and "mole". A website download. I am aware that a search of NIST for MOLE will show that it...

07:38 08/05/29 We have a language and communication issue. In the CODATA world of SI the objective is to "improve" the quality of data and gain an acceptance of the SI unit system. Seems to me that the definitions and useage of words in the US-English language have not been considered when...

Greetings IRstuff I have already implemented exactly what you have suggested. I did it in a MCAD template to make sure I am consistent. In either case, this approach is a Band-Aid since it is correcting a poor, improper or inadequate "MCAD" definition. MCAD is mixing apples and oranges in...

Greetings IRstuff and thanks for your replies. I am going to respond to each of your replies: Reply #1. You just pointed out the glitch. Both Ru = 1545 ( lbf * ft ) / ( lbmole * R ) and Ru = 8.31 joule / ( mole * K ) values are taken from standard engineering texts. As you converted the...

Am attempting to become proficient at MCAD13.1. MCAD advertises that I can add inches + furlongs + kilometers and MCAD will produce the correct answer, in the units of my choice. This means that I should be able to calculate the density of an ideal gas, and input various values of the...

FYI, you have not described your problem. Please describe, fjdcanoe@sbcglobal.net

Greetings QUARK Thanks for the link to MIT. Re: second site, I get to the "home page" but items I select give me "cannot open page" Any suggestions/ Frank fjdcanoe@sbcglobal.net

tc7 - If you do have to worry about air entrainment or foaming, I would suggest a "liquid / vapor" seperator with some sort of secured demister pad. Be certain the demister pad cannot come loose and become entrained with the flow. Note the demister geometry should be cylindrical...

FYI, Have you considered the effects of the solubility of air / nitrogen in glycol??? You are working with might be a "super champagne" bottle on your hands. I know of three situations of gas in liquid: air in water in a chiller application (resulted in pump problem) helium in...