We bring our own temperature probe and measure the temperature when it's actually inside the device. Then you predict from there. Usually, evaporation's not a huge issue for us. We were 0.5 degrees off our prediction.Yes, that is one of my questions. Do most competitions have the water transfered from a large hot beaker to the cool 250ml beaker, or is the 250ml beaker already heated?
Also, if you are heating in the water in the 250ml beaker, have you considered evaporation? Some of the water will evaporate by the time it reaches the desired temperature, especially if you are going to 90oC. How do you account for this?
From an earlier clarification I read, I don't think it's allowed for parts of your device to extend below the lip of your beaker.we have a barrier (with a 1.5 cm hole) that we place into the beaker. it is removable so it doesn't modify the beaker. Could this barrier be placed in before the water is poured, though? it would help save set-up time.
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