Water expands by a factor of 112, or roughly 9 percent, when it freezes. Water, unlike most other liquids, forms stronger hydrogen bonds as temperatures drop. This leads to a crystal lattice structure with voids left between molecules. As the molecules arrange themselves in this manner, the substance expands and becomes less dense.Know More
Water molecules normally slide passed one another fluidly and easily, but when the temperature drops to below freezing, the two hydrogen atoms align with their neighbors. This alignment eventually becomes a rigid, crystal structure, leaving openings between the molecules. These open areas are where the overall volume of the substance has increased, or expanded, by approximately 9 percent, which is why ice floats on water and does not sink.
If water did not expand when frozen, Earth would be a different place. If water contracted when frozen, it would be more dense than the surrounding water and sink. This would leave ice submerged and out of reach of sunlight, while freezing fish and animals living at or near the bottom. The submerged ice would also slowly cool the planet, leading to a cold and inhospitable environment for life as it is known today, particularly so for human life.Learn more about States of Matter
Freezing water causes the volume to expand. Putting 9 milliliters of water through the freezing process leads to a volume of approximately 9.1 milliliters of ice. This is not a huge expansion, but it is significant enough to cause some containers to burst under the strain of the expansion.Full Answer >
The human brain knows that water is wet based on temperature, movement and texture. Human skin does not have sensors that tell the brain water is wet, which is why the other qualities of water are so important and allow humans to recognize wetness.Full Answer >
Tap water freezes much more quickly than salt water. The freezing point of tap water is approximately 32 degrees Fahrenheit. It takes longer for salt water to freeze because it has a higher solute concentration than tap water.Full Answer >
Water is composed of two elements, hydrogen and oxygen. H2O is the chemical formula for water. This means that every water molecule has two hydrogen atoms that are bonded to one oxygen atom.Full Answer >