I was trying to do a reaction at -10C, so I checked the cooling bath list and decided to use ethylene glycol and dry ice. But when I added a little bit more dry ice, the temperature started to drop until around -40C. It is quite different from acetone/dry ice mixture which can always stay around -75C. I was wondering if there is any stiochiometric relationship between ml of ethylene glycol and g of dry ice you need to make -10C. Thank you!