Recent content by bumblebee77

Thank you very much indeed, Steve. This does sound analogous to my situation. You're right to be confused about what I said in my problem statement because I messed up (there are 55 moles in 1 L of water, so I should have said that I can relate that to my 55 molecules of water). It's fine...

Thank you, Chester. The thing I want to do is only use the mechanical mixture volume and density and compare those with the solution properties. I have data on the solution properties, but need to make sure I'm calculating the case where there's no dissolution correctly.

Thank you, pasmith. I need to check modeling results, so need the data to do that.

Is it correct that: density = [ 0.09 * (density of NaCl) ] + [0.91 * (density of water) ] volume = [ (volume of water) + ( { (volume of NaCl) / 48} * 9) ] Thank you so much for any advice.

I think so! It's bugging me a bit though because it seems like too much of a coincidence. I'm actually working at much higher temperatures where I can't use ideal gas.

Yes, you're right.

That is interesting! I'm embarrassed that I never even thought about the units as far as BMI. Now I'm afraid to check. Yes, it was certainly drummed into me to be clear about units. My colleagues think I'm an amateur when I do it. There are a couple of very old codes that people use and I...

In my field, it's still very common to see non-SI units and because people think of them as traditional, they're often not even identified! So much of my life is about figuring out units. Thanks for the interesting comment on the history of SI.

Not allowed to post it! It's pretty hairy anyway. Figuring out as much as I did for the question took three days. What I'm wondering is whether anyone in my field knows what the units should be. Anyway, I figured it out. The pressure is in bar and the volume is in cm3/mol. The conversion...

Thank you, Ibix. I will think this over!

Thank you, Baluncore. I'm not dealing with an ideal gas, but with fluid.

I just realized that when molar volume (units of length^3/mol) and pressure (units of mass/(length*time^2)) are multiplied, the result is energy/mol ((mass * length^2) / (s^2 mol)). I found a table online that shows 1 erg = 2.3901E-11 kilocalories. I still don't know what my conversion...

I'm getting the wrong results when using an old, undocumented code and just realized there's a number lurking in it that I can't account for. It's: 0.023901488 and it is multiplied with molar volume and pressure. I have searched for a couple of hours but just can't figure out what the units...

@mjc123, thank you very much! I don't know why I'm having so much trouble with this. I guess I'm fixated on components because I'm doing simulations at fixed pressure where the volume of my system varies and I'm getting volume output in terms of x, y, z components. I have done similar...

This is not actually a homework problem. I'm old but having trouble with something that's probably at student level because it's so long since I learned this stuff. I would be grateful if someone would please take pity on me and help me out! I am trying to calculate something that includes...