Chapter 15, Problem 84A

Interpretation Introduction

Interpretation: To explain if the density of ice is greater than the ice of water, then what will happen to the pond at $0°\text{C}$ .

Concept Introduction: Water can exist in all three forms of matter i.e., solid, liquid, and gas. In solid it exists in the form of ice, in gas, it exists in the form of water vapor or steam and in liquid, it exists in the form of liquid water.

Answer to Problem 84A

When the density of ice becomes greater than the density of water, then the pond will freeze more quickly.

Explanation of Solution

On cooling a liquid, the density of the liquid increases gradually due to the movement of liquid molecules as they come to each other. If the process of cooling continues, the liquid solidifies into a solid, thereby having a greater density than the density of a liquid.

Due to this reason, the solid sinks into its own liquid or freezes more quickly as the density of the solid is greater than that of the liquid.

Conclusion

Thus, when the density of ice becomes greater than the density of water, then the pond will freeze more quickly.