1. The problem statement, all variables and given/known data Background information: I did an experiment trying to support the validity of Charles' Law - we put a plastic dropper in a container and submerged it in salty water and then put it in the freezer. We watched the water level rise in the plastic dropper. The question is: since we know that air contains water vapour which condenses in cold temperature, can you estimate the significance of this condensation on your measurements? 2. Relevant equations 3. The attempt at a solution I'm just not sure what this means? I know that the change in the water column is due to the combined change of the volume of air inside the dropper and the volume of the plastic dropper itself (which I found to be 6 mL) But I'm not sure how that helps me? Is there supposed to be a numerical answer or just an explanation? So, air contains water vapour that condenses in cold temperature - which means it changes from a gaseous state to a liquid state - does that mean my water level might not be from the salty water that it is submerged in? That is, part of it could come from the condensation of the water vapour in the air?