Water is densest at4℃ When the temperature of Liquid water a given is increased its molecules vibrate Temperature(C) faster and move 10014 farther apart. So the substance expands 10008 This is the case in all 1000 three phases of water apart from the liquid water from 0-4C. The reason IS“ice-like UPon warming. the crystals collaps crystal structure starts Above 4 C, liquid water expands as it is heated because of areater molecular motion to form at 4C Figure 8.11 Between oC and 4'C the volume of liquid water decreases as the tempera- ture increases Above 4C, water behaves the way all other substances do: its volume increases as its temperature increases. The volumes shown here are for a 1-gram sampleWater is densest at 4℃ When the temperature of a given is increased, its molecules vibrate faster and move farther apart. So the substance expands. This is the case in all three phases of water, apart from the liquid water from 0-4℃. The reason is “ice-like” crystal structure starts to form at 4℃