# molar mass

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 November 28, 2003, 13:38 molar mass #1 jim Guest   Posts: n/a Hi, All In tutorial 13 of CFX 5.6, the molar mass of acid(H2SO4) is set to be 19.52 kg/kmol. How to get this value? Can anyone help to list the details of deriving Molar mass from molecular weight? Thanks!

 November 28, 2003, 13:49 Re: molar mass #2 jim Guest   Posts: n/a Aslo: How can I get the kinematic diffusity of a chemical? From literature? or by experiment?

 December 1, 2003, 10:03 Re: molar mass #3 Pascale Fonteijn Guest   Posts: n/a This looks like an average molar mass of a aqueous solution of H2SO4. Pure H2SO4 = 2*1+1*32+4*16 ~98 kg/kmol. Pascale

 December 1, 2003, 10:04 Re: molar mass #4 Pascale Fonteijn Guest   Posts: n/a Yes, from literature, Perry or something. However if conditions are turbulent, then fill in 1e-10 or so. Pascale

 December 1, 2003, 12:55 Re: molar mass #5 jim Guest   Posts: n/a Hi,Pascale, Thanks for your reply. As you said, if conditions are turbulent, then fill in 1e-10 or so---Does this mean the kinematic diffusity will be material independent for turbulent flow? Are you sure of this? By the way, could you please list some literatures about kinematic diffusity? Thanks a lot!

 December 2, 2003, 05:14 Re: molar mass #6 Pascale Fonteijn Guest   Posts: n/a Yes, I am sure. 'Properties of gases and liquids' from Reid is a good start. Pascale

 December 2, 2003, 11:55 Re: molar mass #7 jim Guest   Posts: n/a Thanks a lot for your information! Best regards!

 December 3, 2003, 11:31 Re: molar mass #8 jim Guest   Posts: n/a Hi, Pascale, As you said, the kinematic diffusity will be material independent for turbulent flow. Could you please provide the literature sources for such a conclusion? I am trying to use this conclusion in my thesis work, but I do need to put a reference for that. Thanks again! Jim

 December 4, 2003, 09:34 Re: molar mass #9 Pascale Guest   Posts: n/a pfffff.. Try the cfx-manual as a start. And further... Bird, Stewart and Lightfoot? Pascale

 December 4, 2003, 12:40 Re: molar mass #10 jim Guest   Posts: n/a Thnaks!