Determining Thermal Coefficient of Binary Solvent Mixture

AI Thread Summary
The discussion focuses on creating silica aerogels through freeze-drying, specifically the need for solvent mixtures with low thermal expansion coefficients to prevent damage to the aerogel matrix during crystallization. The main challenge is determining the thermal expansion coefficient for mixtures of solvents, such as Tert Butanol and Propanol. There is a suggestion to use thermodynamic relations to find the coefficient, particularly dV/dT, although this method may be complex. The impact of the solvents being in solid state on the thermal expansion coefficient is also questioned. Understanding these coefficients is crucial for successful aerogel production.
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Hello,

Currently, I am working on a science project involving the creation of silica aerogels through the process of freeze-drying. As a result, i need to experiment with mixtures of solvents with low thermal expansion coefficients (so the crystallization of the solvents will not damage the aerogel matrix) However, i have hit a huge impediment.

While it is relatively simple to look up the thermal expansion coefficients for a given solvent,

how would one determine the thermal expansion coefficient for a mixture of solvents? (For example, the thermal expansion coef of a mixture of Tert Butanol and Propanol?)

Would the coefficient be nearly the same if the solvents were in solid state? (For they will be frozen, then sublimated)
 
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i would suggest finding dV/dT using thermodynamic relations. might get a bit hairy
 
Can you explain this method a bit more in depth?

Thanks
 
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