3 ms·
Hot water and is preferred because it has less gasses dissolved and this way it produces clear ice. Also cold water could freeze too quickly, if the rink is ver
by lmilcin 6y ago
Hot water and is preferred because it has less gasses dissolved and this way it produces clear ice. Also cold water could freeze too quickly, if the rink is very cold, before it has time to spread evenly.
I am pretty sure any tiny time difference, if it exists, would not be worth the hassle of supplying hot water.
- sasaf5 6y ago> Hot water is preferred because it has less gasses dissolved true, but while the temperature decreases the air dissolves back in. What makes ice clear is directional freezing, the sheet freezes from below, pushing the gases up. You can try that in your freezer by putting in it a styrofoam box full of water. Just in this case it will freeze from the top and push the gases downwards. The upper layer will be crystal clear.
- lmilcin 6y agoI did this experiment many times, myself. If you start with boiled water you will get much thinner layer with bubbles. Air actually takes a bit of time to diffuse into water if it isn't getting mixed with air (that's why your fish tank needs air to be actively mixed with water). Starting with thin layer of water that was recently hot gives not enough time for any significant amount of air to dissolve. I work with electronics. I use electronic water for parts cleaning. Electronic water is pure water, distilled, deionized, degassed (no oxygen in it) so it does not oxidise copper traces. It does go bad (bad meaning gets oxygen dissolved) when opened, but think more like hours or even days if proper precautions are taken (don't shake or stir once the container is opened).