When water freezes, energy is released. Conversely, energy is required to melt water by breaking the hydrogen bonds that hold water molecules in a crystalline structure known as ice. Duration: 9:22.
Interesting things occur when solutes are added to water. Freezing is inhibited and temperature decreases. Practical applications can be had from these properties. Duration: 4:37.
Mobile Link: http://bcove.me/y4q79xp8
Kai tests what happens to the boiling temperature of water when salt is added. Duration: 2:58.
Mobile Link: http://bcove.me/a50rw8t3
Like most materials, when water is heated it will expand. However, water has another unique property of occupying more space when it melts. Consequently, water is the most dense at 4 degrees Celsius. Duration: 9:17.
Watch these additional videos to complete this tutorial.