Chemical Forums

Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: AllylicAzideUMN on January 11, 2019, 11:23:35 PM

Title: Dry Ice + Organic Solvent Bath Temperatures
Post by: AllylicAzideUMN on January 11, 2019, 11:23:35 PM
Out of complete curiosity, I'm wondering the relevant properties of a solvent that determine the temperature of its corresponding dry ice bath. Essentially, why is a dry ice/pyridine bath -42 centigrade while a dry ice/acetone bath -78 centigrade? I know dry ice dissolves in the solvent of interest, so I'm guessing CO2 solubility plays a role. Any further insights?
Title: Re: Dry Ice + Organic Solvent Bath Temperatures
Post by: rolnor on January 12, 2019, 05:42:24 AM
Pyridine has melting point -42°C. You can get very cold mixtures if you mix nitric acid and dry ice, I dont remember exact temperature though.