As I am actually performing this, it occurred to me I'm a bit rusty and cannot define the formula to calculate the following process. Anyone who can solve this and show a proof, your help would be appreciated. NO, I'm not a student looking for someone to do my work, I've been out of school for 7 years..... which is why I'm rusty. 10 US gal of a solution is made using 5 gal of boiling water, added to 5 gal of a solution (which is 99% water). These 10 gal are then placed in an empty locker freezer, which is approx 10 cubic ft, and has an ambient temp of -10 degrees(F). My question is: how long should it take to cool the solution to 35 degrees(F)? I have not been able to figure out cold output of the freezer, so answer would have to use a variable to define the strength of the freezer's output in the formula for "t". Thanks in advance.