Recent content by thearny

Product Compression. I am currently doing some work on compression. I know the flowrate in and the pressure and temperature in, and I know the pressure (and flowrate) out. Can I determine the temperature out? I have tried using P1V1/T1=P2V2/T2, but as V is a function of T (using values from...

Comforting news.

I think a self inflating life jacket has excellent applications. Anybody unconscious when they hit the water would not be saved by a CO2 cartridge. Couldn't see it catching on in an aeroplane though, but shipping etc...

For an event to be spontaneous G has to be negative so if entropy is increased the TdS term becomes larger, likewise with temperature, so G is more negative. As stated above, changing T shifts the eqm position so dH (at the old T) is no longer = to TdS (at the new T).

"I'm informed that colliods are especially important for macroscopic measurement of microscopic effects (whatever that means). Could anyone provide an insight, or a good source of information on this topic?" It can prove quite difficult to measure microscopic properties of some colloidal...

excel allows it, and I think sigma plot does too. That all I ever use.

Easier to clean packing than plates I would have thought.

I read a paper yesterday suggesting that salting out is due to an imblance in the chemical potential caused by salt being less soluble by the headgroups. The chemical potential explanation I can accept, but why would the salt be less soluble around the headgroup? - It just about fits... Many...

Many thanks.

Not really. I can't quite envisage it. Salting out (I am applying this to surfactants) means that the surfactant is dragged/forced out of solution. So salting in presumably strengthens the solutions stability, but I can see no justification (experimentally) or mechanism for that.

Recently I read an article describing NaOH as a salting in electrolyte, and I have long held the belief that Na2SO4, Na2CO3 and NaCl etc.. are salting out electrolytes. I cannot see any reason why NaOH should be different. What is the difference between salting in and salting out electrolytes...

I understand that NaCl and NH4HCO3 are reciprocal salt pairs. What does this mean?

I don't know how it reacts, but it is really really exothermic. It can't be washed off the skin because the acid boils causing more severe burns than the acid itself I believe. I would guess dissolution and reaction are the same thing in this case. Cause I also don't really see what the...

Bernoullis equation is the basic fluid flow equation is it not. You can do a lot with that.

Perrys Handbook for Chemical Engineers. On-line edition now available. Genius.