Mixing sodium hydroxide to 200L of water and lime under thermal imaging.
At work we mix lime and caustic (sodium hydroxide) into water at a 4:1 ratio to increase ph in our drilling fluid. A full barrel (205L roughly) at 15 degrees Celsius will heat up to as high as 85 degrees Celsius with one bag of caustic. I got my hands on a thermal imaging camera to see the process but I caught something more interesting. You’ll see in the thermal image that the caustic beads go in cold but heat up substantially when they hit the water/lime mixture.