The density of a substance is defined as the mass divided by the volume: d=m / v. Using graphing techniques, a plot of mass vs. volume will yield a slope (Δy/Δx) of density.
Density is a physical property of a substance that does not depend on the amount of material present and is therefore called an intensive property. In this experiment, you will find the mass of water for five different volumes and plot them. Using a line of best fit, the slope will give you the value of density for water.
Always, water with different temperent has different density.
The density of water is approximately one gram per cubic centimeter. More precisely, it is dependent on its temperature, but the relation is not linear and is not even monotonic (see right-hand table). When cooled from room temperature liquid water becomes increasingly dense, just like other substances. But at approximately 4 °C, pure water reaches its maximum density. As it is cooled further, it expands to become less dense. When the water molecule makes a physical phase change its molecules arrange themselves in distinctly different patterns (Figure 8a-2). The molecular arrangement taken by ice (the solid form of the water molecule) leads to an increase in volume and a decrease in density.
