A. 0°C
B. 4°C
C. 4° K
D. 4.8°C
B. 4°C
Water has maximum density at 4°C. This is because as water cools, its molecules slow down and move closer together, causing its density to increase. At 4°C, the water molecules have reached their maximum density, and as the temperature decreases further, the water molecules start to expand and its density decreases. This is why ice floats on liquid water: ice has a lower density than liquid water because its molecules are more spread out.
A. 0°C is the freezing point of water, at which point it changes from a liquid to a solid.
C. 4°K is equivalent to -269.15°C and is the temperature of absolute zero, the lowest temperature possible.
D. 4.8°C is not a temperature at which water has maximum density.
