ok so i made some observations in all 3 experiments that i recorded in each of the raw results that as soon as I added the solute to the boiling water, the temperature would immediately decrease and then begin to rise again. My explanation for this is that when the solute is added to boiling water, it obviously has a much lower temperature than the water originally so before it begins to dissolve and dissociate etc... its low temperature causes the water temperature to quickly drop but as soon as it begins to dissolve, the water starts to rise again.
Another important observation that I made was that in each experiment, I could actually see water vapour rising and condensing around the place- like when i looked over the pot, i could feel water droplets on my face so there was a lot of evaporation.
In the baking soda experiment- I actually observed in each trial- there was a big reaction with the water. There was a lot of fizzing and bubbles and spilling over the edge of the pot- I actually have a video of that but it isnt working in this blogger upload!!! Anyway, I've linked this to the production of carbon dioxide gas.
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