Thanks Chet.
I have quickly looked at the Lewis number and it is certainly relevant to the problem. I will chase this through. The particular problem I am investigating is injecting water into a concentrated salt solution at 250C. I am wanting to find out whether the water will boil before it...
When I pour two different liquids at different temperatures, into the same container, the temperature will be uneven at the start but then will approach equilibrium. Similarly, the concentrations of each liquid will be uneven but when mixing is complete, there will be the same concentrations...